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Add an additional tool. "The zappa framework"
(Add GDB, Redux.)
(Add an additional tool. "The zappa framework")
 
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Note that presence on this list isn't the same as, nor is it a prerequisite for, applying for the MOSS "Foundational Technology" track - projects have to make an application using the process on the [[MOSS/Foundational Technology|Foundational Technology]] page.
Note that presence on this list isn't the same as, nor is it a prerequisite for, applying for the MOSS "Foundational Technology" track - projects have to make an application using the process on the [[MOSS/Foundational Technology|Foundational Technology]] page.


This is a work in progress - please contribute to this list.
This is a work in progress - please contribute to this list. Note that it's in alphabetical order.


{| class="wikitable"
{| class="wikitable"
|-
|-
! Project !! Description !! Contact within Mozilla
! Project                                               !! Description and Use !! Contact within Mozilla
|-
|-
| [http://angleproject.org/ ANGLE]             || A conformant OpenGL ES implementation for Windows, Mac and Linux || Platform Graphics Team
| [https://www.adjust.com/                     Adjust] || Mobile app analytics; used to track installs on Firefox for Android & other products || Android & iOS teams
|-
|-
| [https://angularjs.org/ angular.js]           || Used by A-Team for web apps (eg Treeherder) || Member of Jonathan Griffin's team
| [https://github.com/apache/incubator-airflow/ Airflow] || Airflow is a platform to programmatically author, schedule and monitor workflows. || Roberto Agostino Vitillo
|-
|-
| [https://httpd.apache.org Apache Server]     || Used by A-Team for web apps || Member of Jonathan Griffin's team
| [http://lcamtuf.coredump.cx/afl/              American Fuzzy Lop] || A security-oriented fuzzer. || Unknown
|-
|-
| [https://github.com/ansible/ansible Ansible] || Used by IT (netops) and A-Team to manage deployments || jbarnell , Webops, GPS?
| [http://angleproject.org/                     ANGLE] || A conformant OpenGL ES implementation for Windows, Mac and Linux || Platform Graphics Team
|-
|-
| [https://github.com/h4writer/arewefastyet AreWeFastYet] || Compare JS performance across JS engines and platforms || Hannes Verschore
| [https://angularjs.org/                       angular.js] || Used by A-Team for web apps (eg Treeherder) || Member of Jonathan Griffin's team
|-
|-
| [https://github.com/argonjs Argon] || Used as the foundation for mobile AR web browser research by Emerging Tech || Blair MacIntyre
| [https://httpd.apache.org                    Apache Server] || Used by A-Team for web apps || Member of Jonathan Griffin's team
|-
|-
| [https://atom.io/ Atom]                       || Used (either vanilla or e.g. as [https://github.com/Microsoft/vscode] ) by various developers ||
| [https://github.com/ansible/ansible          Ansible] || Used by IT (netops) and A-Team to manage deployments || jbarnell , Webops, GPS?
|-
|-
| [https://babeljs.io/ BabelJS]                 || JavaScript compiler, Used by Gaia, TaskCluster team || Selena Deckelmann
| [https://github.com/h4writer/arewefastyet    AreWeFastYet] || Compare JS performance across JS engines and platforms || Hannes Verschore
|-
|-
| [https://www.isc.org/downloads/bind/ BIND] || DNS Server || Brian Hourigan
| [https://github.com/argonjs                  Argon] || Used as the foundation for mobile AR web browser research by Emerging Tech || Blair MacIntyre
|-
|-
| [https://pypi.python.org/pypi/bleach/ Bleach] || HTML sanitizing library that escapes or strips markup and attributes used by MDN and a bunch of Mozilla sites || Will Kahn-Greene
| [https://atom.io/                            Atom] || Used (either vanilla or e.g. as [https://github.com/Microsoft/vscode] ) by various developers ||
|-
|-
| [https://pypi.python.org/pypi/blessings/ Blessings] || Terminal formatting lib used by mozilla-central build process || Erik Rose
| [https://babeljs.io/                         BabelJS] || JavaScript compiler, Used by Gaia, TaskCluster team || Selena Deckelmann
|-
|-
| [http://getbootstrap.com/ Bootstrap] || HTML/CSS/JS framework, used by many of Mozilla's sites. || Webdev
| [https://www.isc.org/downloads/bind/         BIND] || DNS Server || Brian Hourigan
|-
|-
| [http://brew.sh/ brew / Homebrew] || Mac OS X packaging system, used to install dev tools || Sam Penrose
| [https://pypi.python.org/pypi/bleach/         Bleach] || HTML sanitizing library that escapes or strips markup and attributes used by MDN and a bunch of Mozilla sites || Will Kahn-Greene
|-
|-
| [https://bro.org bro]                   || The Bro Network Security Monitor || Michal Purzynski
| [https://pypi.python.org/pypi/blessings/      Blessings] || Terminal formatting lib used by mozilla-central build process || Erik Rose
|-
|-
| [http://browserify.org Browserify]                   || Build JS dependencies for the browser || mozilla-services (kinto.js)
| [https://chromium.googlesource.com/chromium/blink/+log/master/Source/modules/webaudio Blink Web Audio] || Web audio implementation from Blink ||  
|-
|-
| [http://buildbot.net/ BuildBot]               || The base system currently in use for release || Dustin J. Mitchell
| [http://getbootstrap.com/                     Bootstrap] || HTML/CSS/JS framework, used by many of Mozilla's sites. || Webdev
|-
|-
| [http://bugzilla.org/ Bugzilla] (upstream)    || The base Bugzilla on that we customize for Mozilla's use || Mark Côté
| [https://bro.org                             bro] || The Bro Network Security Monitor || Michal Purzynski
|-
|-
| [http://www.celeryproject.org/ Celery] || Distributed task queue. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [https://github.com/google/brotli            brotli] || Compression library ||
|-
|-
| [http://cffi.readthedocs.io/en/latest/ cffi] || C Foreign Function Interface for Python. || Cloud Services Team
| [http://browserify.org                        Browserify] || Build JS dependencies for the browser || mozilla-services (kinto.js)
|-
|-
| [http://ckeditor.com/ CKEditor] || WYSIWYG editor on MDN ||  
| [http://buildbot.net/                         BuildBot] || The base system currently in use for release || Dustin J. Mitchell
|-
|-
| [https://cmake.org/ CMake] || cross-platform family of tools designed to build, test and package software, lua_sandbox, lua_sandbox_extensions, hindsight, hindsight_admin || Mike Trinkala
| [http://bugzilla.org/                         Bugzilla] (upstream) || The base Bugzilla on that we customize for Mozilla's use || Mark Côté
|-
|-
| [http://chaijs.com/ Chai] || JavaScript test and assertion library || Cloud Services, Tarek Ziade's team (kinto.js), Firefox Hello team
| [https://www.cairographics.org/               Cairo] || Vector graphics-based, device independent API; includes pixman || Jeff Muizelaar
|-
|-
| [http://www.llvm.org Clang/LLVM]           || C/C++ compiler and infrastructure || Ehsan Akhgari & Sylvestre Ledru
| [https://ccache.samba.org/                   ccache] || A compiler cache; used by Servo and Gecko builds || Ted Mielczarek
|-
|-
| [https://codemirror.net/ CodeMirror]           || Used in DevTools, [https://thimble.mozilla.org Thimble], and other online code tools || David Humphrey/Simon Wex
| [http://www.celeryproject.org/               Celery] || Distributed task queue. Used by Treeherder and others. || Member of Jonathan Griffin's team
|-
|-
| [https://pypi.python.org/pypi/cookiecutter/ Cookiecutter] || Templating system used to clone our [https://github.com/mozilla/sugardough Sugardough] Django template || Giorgos Logiotatidis
| [https://github.com/awslabs/certlint          certlint] || Certificate checking tool, used by the Root Store team || Kathleen Wilson
|-
|-
| [https://conemu.github.io/ ConEmu] || Console emulator for Windows. Used by devs running Windows. || Ed Morley
| [http://cffi.readthedocs.io/en/latest/        cffi] || C Foreign Function Interface for Python. || Cloud Services Team
|-
|-
| [https://pypi.python.org/pypi/ConfigArgParse ConfigArgParse] || A drop-in replacement for argparse that allows options to also be set via config files and/or environment variables || Cloud Services Team
| [http://ckeditor.com/                         CKEditor] || WYSIWYG editor on MDN ||
|-
|-
| [http://curl.haxx.se/ curl] || internet transfer tool and library, used by crashreporter and FirefoxOS || Daniel Stenberg
| [http://unicode.org/cldr/trac/browser/trunk  CLDR] || Common Locale Data Repository - Unicode data ||
|-
|-
| [https://www.debian.org/ Debian] || Used on many developer boxes || Sylvestre Ledru or glandium
| [https://cmake.org/                           CMake] || cross-platform family of tools designed to build, test and package software, lua_sandbox, lua_sandbox_extensions, hindsight, hindsight_admin || Mike Trinkala
|-
|-
| [http://deis.io Deis] || Open Source Heroku-like PaaS platform. Hosts www.mozilla.org, masterfirefoxos.mozilla.org, etc. || Member of Benjamin Sternthal's team
| [http://chaijs.com/                          Chai] || JavaScript test and assertion library || Cloud Services, Tarek Ziade's team (kinto.js), Firefox Hello team
|-
|-
| [https://disconnect.me/trackerprotection Disconnect.me ] || Open, transparent, neutral Tracking Protection blocklist used in Firefox Private Browsing Windows || Marshall Erwin, Javaun Moradi, Francois Marier
| [https://bitbucket.org/chromiumembedded/cef  Chromium Embedded Framework] || A simple framework for embedding browsers in other applications || Jack Moffitt
|-
|-
| [https://discourse.org Discourse] || [https://discourse.mozilla-community.org Community], [https://discourse.webmaker.org/ Webmaker], [https://discourse.mozilla-advocacy.org/ Advocacy], et al || [[IT/Community/WG/Discourse|Community Ops]] (Yousef Alam or Tanner Filip)
| [http://www.llvm.org                         Clang/LLVM] || C/C++ compiler and infrastructure || Ehsan Akhgari & Sylvestre Ledru
|-
|-
| [https://djangoproject.com Django]     || Backend web framework used on many of our websites, including addons.mozilla.org, marketplace.mozilla.org, support.mozilla.org, Input, Snippets, MDN (Mozilla Developer Network), mozilla.org, nucleus, Treeherder || Andy McKay and Jannis Leidel are (or have been) on the [https://www.djangoproject.com/foundation/ Django Software Foundation] board, Jannis is core team member
| [https://codemirror.net/                      CodeMirror] || Used in DevTools, [https://thimble.mozilla.org Thimble], and other online code tools || David Humphrey/Simon Wex
|-
|-
| [http://www.django-rest-framework.org Django REST framework]     || API framework. Used by various Mozilla sites including MDN, Firefox marketplace, mozilla.org, support.mozilla.com. || Andy McKay and Jannis Leidel
| [https://pypi.python.org/pypi/cookiecutter/  Cookiecutter] || Templating system used to clone our [https://github.com/mozilla/sugardough Sugardough] Django template || Giorgos Logiotatidis
|-
|-
| [https://github.com/docker/docker Docker]     || Used by release engineering for Linux build and test containers and by ateam for managing test and production services. Used by many Mozilla websites as well such as addons.mozilla.org, marketplace.mozilla.org. (Plus docker-compose and docker machine) || Member of Selena Deckelmann's team
| [https://gcc.godbolt.org/                     Compiler Explorer - C++] || Online C++ compiler with assembly output. Used by devs to test&optimize code snippets. || Unknown
|-
|-
| [http://www.stack.nl/~dimitri/doxygen/ Doxygen] || tool for generating documentation from annotated sources, lua_sandbox || Mike Trinkala 
| [https://rust.godbolt.org/                   Compiler Explorer - Rust] || Online Rust compiler with assembly output. Used by devs to test&optimize code snippets. || Unknown
|-
|-
| [https://drupal.org/ Drupal] || Open Source CMS. Used by Dev Rel team. || Potch
| [https://conemu.github.io/                    ConEmu] || Console emulator for Windows. Used by devs running Windows. || Ed Morley
|-
| [https://pypi.python.org/pypi/ConfigArgParse  ConfigArgParse] || A drop-in replacement for argparse that allows options to also be set via config files and/or environment variables || Cloud Services Team
|-
| [http://crt.sh/                              crt.sh] || Global certificate corpus search website || Gervase Markham
|-
| [http://github.com/kinetiknz/cubeb.git        cubeb] || Cross-platform audio library ||
|-
| [http://curl.haxx.se/                        curl] || internet transfer tool and library, used by crashreporter and FirefoxOS || Daniel Stenberg
|-
| [https://www.debian.org/                      Debian] || Used on many developer boxes || Sylvestre Ledru or glandium
|-
| [http://deis.io                              Deis] || Open Source Heroku-like PaaS platform. Hosts www.mozilla.org, masterfirefoxos.mozilla.org, etc. || Member of Benjamin Sternthal's team
|-
| [https://disconnect.me/trackerprotection      Disconnect.me ] || Open, transparent, neutral Tracking Protection blocklist used in Firefox Private Browsing Windows || Marshall Erwin, Javaun Moradi, Francois Marier
|-
| [https://discourse.org                        Discourse] || [https://discourse.mozilla-community.org Community], [https://discourse.webmaker.org/ Webmaker], [https://discourse.mozilla-advocacy.org/ Advocacy], et al || [[IT/Community/WG/Discourse|Community Ops]] (Yousef Alam or Tanner Filip)
|-
| [https://djangoproject.com                    Django] || Backend web framework used on many of our websites, including addons.mozilla.org, marketplace.mozilla.org, support.mozilla.org, Input, Snippets, MDN (Mozilla Developer Network), mozilla.org, nucleus, Treeherder || Andy McKay and Jannis Leidel are (or have been) on the [https://www.djangoproject.com/foundation/ Django Software Foundation] board, Jannis is core team member
|-
| [http://www.django-rest-framework.org        Django REST framework] || API framework. Used by various Mozilla sites including MDN, Firefox marketplace, mozilla.org, support.mozilla.com. || Andy McKay and Jannis Leidel
|-
| [https://github.com/docker/docker            Docker] || Used by release engineering for Linux build and test containers and by ateam for managing test and production services. Used by many Mozilla websites as well such as addons.mozilla.org, marketplace.mozilla.org. (Plus docker-compose and docker machine) || Member of Selena Deckelmann's team
|-
| [https://github.com/google/double-conversion  double-conversion] || Efficient binary-decimal and decimal-binary conversion routines for IEEE doubles ||
|-
| [http://www.stack.nl/~dimitri/doxygen/        Doxygen] || tool for generating documentation from annotated sources, lua_sandbox || Mike Trinkala
|-
| [https://drupal.org/                         Drupal] || Open Source CMS. Used by Dev Rel team. || Potch
|-  
|-  
| [https://pypi.python.org/pypi/ecdsa ecdsa] || ECDSA cryptographic signature library (pure python) || Cloud Services Team
| [https://pypi.python.org/pypi/ecdsa           ecdsa] || ECDSA cryptographic signature library (pure python) || Cloud Services Team
|-
| [https://eclipse.org/                        Eclipse] || Integrated Development Environment used by many developers || —
|-
|-
| [https://eclipse.org/ Eclipse] || Integrated Development Environment used by many developers || —
| [http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libedit editline] || Line editing library (from libedit) ||
|-
|-
| [https://www.elastic.co/products/elasticsearch elasticsearch] || Search engine for various web sites and analytics || Erik Rose (dxr), Kyle Lahnakoski (ActiveData), Jason Thomas
| [https://www.elastic.co/products/elasticsearch elasticsearch] || Search engine for various web sites and analytics || Erik Rose (dxr), Kyle Lahnakoski (ActiveData), Jason Thomas
|-
|-
| [http://www.gnu.org/software/emacs/ emacs] || Programmable editor used by many developers || —
| [http://elm-lang.org/                        Elm] || A delightful language for reliable webapps. || Rok Garbas (garbas), Release Engineering Team
|-
| [http://www.gnu.org/software/emacs/           emacs] || Programmable editor used by many developers || —
|-
| [https://emojione.com/                        EmojiOne] || Upstream Emoji artwork used in the Firefox built-in Emoji font || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])
|-
| [http://eslint.org/                          eslint] || Pluggable linting utiltity used by Firefox Hello, DevTools and Firefox Android || Mark Banner, Nicolas Perriault
|-
|-
| [http://eslint.org/ eslint] || Pluggable linting utiltity used by Firefox Hello, DevTools and Firefox Android || Mark Banner
| [https://github.com/ether/etherpad-lite      Etherpad] || Used for meeting notes, etc || JP Schneider
|-
|-
| [https://github.com/ether/etherpad-lite Etherpad]     || Used for meeting notes, etc || JP Schneider
| [https://github.com/freebsd/freebsd/tree/master/lib/msun/src fdlibm] || ??? ||  
|-
|-
| [https://ffmpeg.org/ ffmpeg] || Used for media decoding. || Jean-Yves Avenard
| [https://ffmpeg.org/                         ffmpeg] || Used for media decoding. || Jean-Yves Avenard
|-
|-
| [https://flake8.readthedocs.org/ flake8] || Wrapper around Python linters. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [https://flake8.readthedocs.org/             flake8] || Wrapper around Python linters. Used by Treeherder and others. || Member of Jonathan Griffin's team
|-
|-
| [http://flask.pocoo.org/ Flask]               || Python web framework || Erik Rose
| [http://flask.pocoo.org/                     Flask] || Python web framework || Erik Rose
|-
|-
| [https://flowtype.org/ Flow] || A static type checker for JavaScript || Greg Tatum, Jason Laster
| [https://flowtype.org/                       Flow] || A static type checker for JavaScript || Greg Tatum, Jason Laster, Nicolas Perriault
|-
|-
| [https://fortawesome.github.io/Font-Awesome/ Font Awesome] || Font and CSS toolkit, used by many of Mozilla's sites. || Webdev
| [https://fortawesome.github.io/Font-Awesome/ Font Awesome] || Font and CSS toolkit, used by many of Mozilla's sites. || Webdev
|-
|-
| [http://foundation.zurb.com/ Foundation Framework] || Responsive front-end framework, used by some Mozilla sites and add-ons || Luke Crouch
| [http://fontforge.github.io/en-US/           FontForge] || Built-in Emoji font compilation || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])
|-
|-
| [https://www.freetype.org/ FreeType] || Small, efficient, highly customizable, and portable library for producing high-quality output (glyph images) of most vector and bitmap font formats. || Platform team
| [https://pypi.python.org/pypi/FontTools      FontTools] || Built-in Emoji font compilation || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])
|-
|-
| [http://gcc.gnu.org GCC]                     || C/C++ compiler and infrastructure || Nathan Froyd
| [http://foundation.zurb.com/ Foundation      Framework] || Responsive front-end framework, used by some Mozilla sites and add-ons || Luke Crouch
|-
|-
| [http://https://www.sourceware.org/gdb/ GDB] || The GNU Debugger, the sole debugger for Linux || Jim Blandy
| [https://www.freetype.org/                   FreeType] || Small, efficient, highly customizable, and portable library for producing high-quality output (glyph images) of most vector and bitmap font formats. || Platform team
|-
|-
| [https://git-scm.com/ Git]                   || Version control system - https://git.mozilla.org || Unknown
| [http://gcc.gnu.org                          GCC] || C/C++ compiler and infrastructure || Nathan Froyd
|-
|-
| [http://graphite.sil.org/ Graphite]                   || Graphite is a "smart font" system developed specifically to handle the complexities of lesser-known languages of the world. || Platform team
| [http://https://www.sourceware.org/gdb/      GDB] || The GNU Debugger, the sole debugger for Linux || Jim Blandy
|-
|-
| [http://gunicorn.org/ gunicorn] || Python WSGI HTTP Server. Used by Treeherder, Socorro, Pontoon. || Webdev
| [https://git-scm.com/                        Git] || Version control system - https://git.mozilla.org || Unknown
|-
| [https://www.freedesktop.org/wiki/Software/glitz/ Glitz] || OpenGL image compositing library ||
|-
| [https://gradle.org/                          Gradle] || Build automation system; used to build Firefox for Android || Android team
|-
| [http://graphite.sil.org/                    Graphite] || Graphite is a "smart font" system developed specifically to handle the complexities of lesser-known languages of the world. || Platform team
|-
| [http://gunicorn.org/                         gunicorn] || Python WSGI HTTP Server. Used by Treeherder, Socorro, Pontoon. || Webdev
|-
| [https://github.com/apache/hive/              Hive] || The Apache Hive data warehouse software facilitates reading, writing, and managing large datasets residing in distributed storage using SQL. || Roberto Agostino Vitillo
|-
|-
| [http://www.freedesktop.org/wiki/Software/HarfBuzz/ HarfBuzz] || International text shaping engine used in Firefox/Servo || Platform team
| [http://www.freedesktop.org/wiki/Software/HarfBuzz/ HarfBuzz] || International text shaping engine used in Firefox/Servo || Platform team
|-
|-
| [http://hunspell.sourceforge.net/ Hunspell] || Spellchecking engine || Ehsan Akhgari
| [https://github.com/apache/hbase/            HBase] || HBase is an open-source, distributed, versioned, column-oriented store modeled after Bigtable. || Roberto Agostino Vitillo
|-
| [http://brew.sh/ brew /                      Homebrew] || Mac OS X packaging system, used to install dev tools || Sam Penrose
|-
| [http://homu.io/                             Homu] || A bot that integrates with your favorite continuous integration service; used by Rust and Servo || Jack Moffitt
|-
|-
| [https://github.com/hunspell/hyphen/ Hyphen] || Hyphenation library || Jonathan Kew
| [http://hunspell.sourceforge.net/             Hunspell] || Spellchecking engine || Ehsan Akhgari
|-
|-
| [https://github.com/jkbrzt/httpie HTTPie] || HTTP command-line client || Cloud Services (among many others), Tarek Ziade's team
| [https://github.com/hunspell/hyphen/          Hyphen] || Hyphenation library || Jonathan Kew
|-
|-
| [https://python-hyper.org/en/latest/ hyper] || Hyper is a set of related projects that provide HTTP/2 functionality to Python projects. || Cloud Services Team
| [https://github.com/jkbrzt/httpie            HTTPie] || HTTP command-line client || Cloud Services (among many others), Tarek Ziade's team
|-
|-
| [http://www.inspircd.org/ inspircd]                 || Irc server used by mozilla || :ashish
| [https://python-hyper.org/en/latest/          hyper] || Hyper is a set of related projects that provide HTTP/2 functionality to Python projects. || Cloud Services Team
|-
|-
| [https://theintern.github.io/intern/ Intern] || Intern is a complete test system for JavaScript designed to help you write and run consistent, high-quality test cases for your JavaScript libraries and applications.  || jrgm/vladikoff
| [https://hyper.rs/hyper/v0.10.0/hyper/       Hyper] || A fast, modern HTTP implementation written in and for Rust; used by Servo || Sean McArthur
|-
|-
 
| [https://github.com/icecc/icecream            Icecream (icecc)] || Distributed build system, used to speed up local Firefox build times in some Mozilla offices || Daniel Holbert, or contributors on the [https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Using_Icecream Icecream MDN Page]
| [http://canonware.com/jemalloc/ jemalloc]     || Memory allocation library || We can ask glandium
|-
| [https://ssl.icu-project.org/repos/icu/icu/  ICU] || (And ICU4J) International Components for Unicode - internationalization library ||
|-
| [http://ideone.com/                          ideone.com] || Online compiler & runner for a number of languages. Used by devs to test&benchmark code snippets. || Unknown
|-
| [http://www.inspircd.org/                    inspircd] || Irc server used by mozilla || :ashish
|-
| [https://theintern.github.io/intern/          Intern] || Intern is a complete test system for JavaScript designed to help you write and run consistent, high-quality test cases for your JavaScript libraries and applications.  || jrgm/vladikoff
|-
| [http://canonware.com/jemalloc/               jemalloc] || Memory allocation library || We can ask glandium
|-
|-
| [http://jenkins-ci.org/ Jenkins CI]                   || Continuous integration system used by WebQA and EE || Unknown
| [http://jenkins-ci.org/                       Jenkins CI] || Continuous integration system used by WebQA and EE || Unknown
|-
|-
| [https://jquery.com/ jQuery] || JavaScript library, used by many of Mozilla's sites. || Webdev
| [https://jquery.com/                         jQuery] || JavaScript library, used by many of Mozilla's sites. || Webdev
|-
|-
| [https://github.com/tmpvar/jsdom jsdom] || DOM implementation in full JS || Test suites in Cloud Services, Tarek Ziade's team (kinto.js)
| [https://github.com/tmpvar/jsdom             jsdom] || DOM implementation in full JS || Test suites in Cloud Services, Tarek Ziade's team (kinto.js)
|-
|-
| [https://github.com/open-source-parsers/jsoncpp jsoncpp] || A C++ library for interacting with JSON, used by the crashreporter client and Socorro. || Gabriele Svelto
| [https://github.com/open-source-parsers/jsoncpp jsoncpp] || A C++ library for interacting with JSON, used by the crashreporter client and Socorro. || Gabriele Svelto
|-
|-
| [https://kafka.apache.org/ Kafka] || Distributed transaction log, used for hg.mozilla.org replication. || gps
| [https://github.com/jodeleeuw/jsPsych        jsPsych] || A JavaScript library for creating and running behavioral experiments in a web browser. || Josh Gaunt
|-
| [https://github.com/jupyter/notebook/        Jupyter Notebook] || The Jupyter notebook is a web-based notebook environment for interactive computing. || Roberto Agostino Vitillo
|-
| [https://kafka.apache.org/                   Kafka] || Distributed transaction log, used for hg.mozilla.org replication. || gps
|-
|-
| [http://kombu.readthedocs.org/ Kombu] || Messaging library for Python. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [http://hg.code.sf.net/p/kissfft/code        kissfft] || FFT library, presumably ||
|-
|-
| libbz2                                        || Compression library for .bz2 format || Julian Seward
| [https://github.com/airbnb/knowledge-repo/    Knowledge Repo] || The Knowledge Repository project is focused on facilitating the sharing of knowledge between data scientists and other technical roles using data formats and tools that make sense in these professions. || Roberto Agostino Vitillo
|-
|-
| [http://libevent.org/ libevent] || Provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. || Platform team
| [http://kombu.readthedocs.org/               Kombu] || Messaging library for Python. Used by Treeherder and others. || Member of Jonathan Griffin's team
|-
|-
| [https://sourceware.org/libffi/ libffi] || A Portable Foreign Function Interface Library. || Platform team
| [https://www.latex-project.org/               LaTeX] || A document preparation system. || Alan Jeffrey (ajeffrey)
|-
|-
| [http://libjpeg-turbo.virtualgl.org/ libjpeg-turbo] || JPEG decoding library || Jeff Muizelaar
| [https://github.com/square/leakcanary        Leak Canary] || Android memory leak detection framework || Android team
|-
|-
| [http://www.libpng.org/pub/png/libpng.html libpng] || PNG decoding library || Jeff Muizelaar
| [https://libav.org/                           libav] || Audio and video libraries ||
|-
|-
| libvpx (Google)                              || Library for support of Google’s VP* family of codecs || Tim Terriberry
| [http://www.bzip.org/                        libbz2] || Compression library for .bz2 format || Julian Seward
|-
|-
| Linux                                        || OS kernel used in Firefox OS || Unknown
| [http://libevent.org/                        libevent] || Provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. || Platform team
|-
|-
| LLVM || Compiler foundation for ASAN, static analysis tools, Rust || Unknown
| [https://sourceware.org/libffi/              libffi] || A Portable Foreign Function Interface Library. || Platform team
|-
|-
| [https://lodash.com/ lodash] || JavaScript utility library, used by many of Mozilla's sites. || Webdev & Firefox Hello
| [http://libjpeg-turbo.virtualgl.org/         libjpeg-turbo] || JPEG decoding library || Jeff Muizelaar
|-
|-
| [https://www.lua.org/ Lua] || Lua is a powerful, efficient, lightweight, embeddable scripting language, lua_sandbox_extensions || Mike Trinkala
| [https://github.com/kinetiknz/nestegg        libnestegg] || WebM demuxer ||
|-
|-
| [https://github.com/macvim-dev/macvim MacVim] || Mac wrapper around Vim || -
| [http://www.libpng.org/pub/png/libpng.html    libpng] || PNG decoding library || Jeff Muizelaar
|-
|-
| [https://www.list.org/ Mailman]     || [https://mail.mozilla.org/listinfo Mailing lists] || Unknown
| [https://www.webmproject.org/code/            libvpx (Google)] || Library for support of Google’s VP* family of codecs; includes libmkv || Tim Terriberry
|-
| [https://chromium.googlesource.com/libyuv/libyuv/ libyuv] || Colourspace conversion ||
|-
| [http://llvm.org/                            LLVM] || Compiler foundation for ASAN, static analysis tools, Rust || Unknown
|-
| [https://lodash.com/                          lodash] || JavaScript utility library, used by many of Mozilla's sites. || Webdev & Firefox Hello
|-
| [https://www.lua.org/                        Lua] || Lua is a powerful, efficient, lightweight, embeddable scripting language, lua_sandbox_extensions || Mike Trinkala
|-
| [https://github.com/macvim-dev/macvim        MacVim] || Mac wrapper around Vim || -
|-
| [https://www.list.org/                       Mailman] || [https://mail.mozilla.org/listinfo Mailing lists] || Unknown
|-  
|-  
| [https://pypi.python.org/pypi/marshmallow marshmallow] || A lightweight library for converting complex datatypes to and from native Python datatypes. || Cloud Services Team
| [https://pypi.python.org/pypi/marshmallow     marshmallow] || A lightweight library for converting complex datatypes to and from native Python datatypes. || Cloud Services Team
|-
|-
| [https://www.mediawiki.org/wiki/MediaWiki MediaWiki]     || You are reading this on a wiki || Shyam Mani
| [https://www.mediawiki.org/wiki/MediaWiki     MediaWiki] || You are reading this on a wiki || Shyam Mani
|-
|-
| [https://www.mercurial-scm.org/ Mercurial]   || Version control system and source code management || GPS  
| [https://www.mercurial-scm.org/               Mercurial] || Version control system and source code management || GPS  
|-
|-
| [https://www.meteor.com/ Meteor]   || Build Apps with Javascript - Used in MozDef's Web UI || MozDef Team in EIS
| [https://www.mesa3d.org/                     Mesa] || 3D graphics library used by Servo & Gecko || Unknown
|-
|-
| [http://mochajs.org/ Mocha] || JavaScript test runner || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team
| [https://www.meteor.com/                     Meteor] || Build Apps with Javascript - Used in MozDef's Web UI || MozDef Team in EIS
|-
|-
| [https://github.com/kumar303/mohawk Mohawk] || Python library for Hawk HTTP authorization. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [http://mochajs.org/                         Mocha] || JavaScript test runner || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team
|-
|-
| [http://mozdef.com mozdef]                   || Security event monitoring and incident response || Jeff Bryner
| [https://github.com/kumar303/mohawk          Mohawk] || Python library for Hawk HTTP authorization. Used by Treeherder and others. || Member of Jonathan Griffin's team
|- 
| [http://mozdef.com                           mozdef] || Security event monitoring and incident response || Jeff Bryner
|-
|-
| [http://www.mingw.org/wiki/msys msys]         || Used to build Firefox on Windows. Note: It's likely best we support the newer MSYS2 project instead: https://github.com/msys2 || Unknown
| [http://www.mingw.org/wiki/msys               msys] || Used to build Firefox on Windows. Note: It's likely best we support the newer MSYS2 project instead: https://github.com/msys2 || Unknown
|-
|-
| [https://www.mysql.com/ MySQL]               || Open source relational DB used by many developers, including AMO, SUMO, Input, bugzilla, releng, adminstered by IT || Matt Pressman
| [https://www.mysql.com/                       MySQL] || Open source relational DB used by many developers, including AMO, SUMO, Input, bugzilla, releng, adminstered by IT || Matt Pressman
|-
|-
| [https://www.nagios.org/ Nagios]             || IT management system. Used for notifications of system failures || Linda Ypulong
| [https://www.nagios.org/                     Nagios] || IT management system. Used for notifications of system failures || Linda Ypulong
|-
|-
| [http://netsniff-ng.org/ netsniff-ng]                   || Linux networking toolkit || Michal Purzynski
| [http://netsniff-ng.org/                     netsniff-ng] || Linux networking toolkit || Michal Purzynski
|-
|-
| [https://neovim.io/ neovim] (nvim) || Next-generation vim code editor || Ralph Giles
| [https://neovim.io/                           neovim] (nvim) || Next-generation vim code editor || Ralph Giles
|-
|-
| nICEr                                        || Library for traversing firewalls || Unknown
| [https://ninja-build.org/                    Ninja] || A small build system with a focus on speed - used by Servo dependencies. || Jack Moffitt
|-
|-
| [https://nixos.org NixOS]                     || Reproducible Linux distribution. Used by some developers || Nicolas B. Pierron
| [https://nixos.org/Nix                        Nix] || Reproducible build tool. || Rok Garbas (garbas), Release Engineering Team
|-
|-
| [https://www.nginx.com/resources/wiki/contributing/github/ nginx] || Web Server. Used by almost everything CloudOps runs. || Travis Blow
| [https://nixos.org                            NixOS] || Reproducible Linux distribution. Used by some developers || Nicolas B. Pierron
|-
|-
| [https://nodejs.org Node.js]                 || JavaScript runtime for server side applications, command line utilities || Nick Desaulniers
| [https://www.nginx.com/                      nginx] || Web Server. Used by almost everything CloudOps runs. || Travis Blow
|-
|-
| nrappkit                                      || Toolkit for building standalone applications || Unknown
| [https://nodejs.org                          Node.js] || JavaScript runtime for server side applications, command line utilities || Nick Desaulniers
|-
|-
| [http://nsis.sourceforge.net/Main_Page NSIS] || Windows installer framework || Matt Howell
| [http://nrappkit.sourceforge.net/             nrappkit] || Toolkit for building standalone applications || Unknown
|-
|-
| [https://wiki.mozilla.org/NSS NSS] || Network Security Services || jcjones?
| [http://nsis.sourceforge.net/Main_Page        NSIS] || Windows installer framework || Matt Howell
|-
|-
| [https://github.com/cisco/OpenH264 OpenH264] (Cisco)                              || H.264 video library || Unknown
| [https://wiki.mozilla.org/NSS                NSS] || Network Security Services || jcjones?
|-
|-
| [http://www.openLDAP.org/ OpenLDAP]                 || User management used by Infra || :jabba?
| [https://www.gnu.org/software/octave/        Octave] || Numerical analysis/mathematics software. || Jean-Marc Valin
|-
|-
| [http://openresty.org OpenResty]             || a fast web app server by extending nginx, used by cloudops || Benson Wong (mostlygeek)
| [https://github.com/cisco/OpenH264            OpenH264] (Cisco) || H.264 video library || Unknown
|-
|-
| [http://www.openssh.com/ OpenSSH]                 || Remote server management, secure transport for Git and Mercurial || Unknown
| [http://www.openLDAP.org/                     OpenLDAP] || User management used by Infra || :jabba?
|-
|-
| [http://openssl.org/ OpenSSL]                 || Cryptograpahy and TLS Toolkit || Nick Desaulniers
| [http://openresty.org                         OpenResty] || a fast web app server by extending nginx, used by cloudops || Benson Wong (mostlygeek)
|-
|-
| [https://www.openstreetmap.org OpenStreetMap]     || Online/offline maps, used by the location service and on mozilla.org || Unknown
| [http://www.openssh.com/                      OpenSSH] || Remote server management, secure transport for Git and Mercurial || Unknown
|-
|-
| [https://openvpn.net/ Openvpn]                 || VPN used by Infra || :jabba?
| [http://openssl.org/                         OpenSSL] || Cryptograpahy and TLS Toolkit || Nick Desaulniers
|-
|-
| [https://github.com/khaledhosny/ots OTS]     || OpenType sanitizer used by Firefox to protect against security bugs in underlying platforms related to malicious fonts || Jonathan Kew
| [https://www.openstreetmap.org                OpenStreetMap] || Online/offline maps, used by the location service and on mozilla.org || Unknown
|-
|-
| [https://www.owasp.org/index.php/ZAP OWASP ZAP]                 || Web security testing tool used by security and QA teams || Simon Bennetts (psiinon)
| [https://openvpn.net/                         Openvpn] || VPN used by Infra || :jabba?
|-
|-
| [https://owncloud.org/ Owncloud]                 || Open platform to host your cloud under your control || Some communities have been using it to host files under their control (ask Nukeador)
| [https://github.com/ValveSoftware/openvr/    OpenVR] || VR hardware support library ||
|-
|-
| [http://pandoc.org/ Pandoc] || universal document converter, lua_sandbox_extensions || Mike Trinkala 
| [https://github.com/khaledhosny/ots          OTS] || OpenType sanitizer used by Firefox to protect against security bugs in underlying platforms related to malicious fonts || Jonathan Kew
|-
|-
| [https://github.com/apache/parquet-cpp parquet-cpp] || C++ library to read and write the Apache Parquet columnar data format, lua_sandbox_extensions || Mike Trinkala
| [https://www.owasp.org/index.php/ZAP          OWASP ZAP] || Web security testing tool used by security and QA teams || Simon Bennetts (psiinon)
|-
|-
| [https://pypi.python.org/pypi/parsimonious/ Parsimonious] || Parsing lib used by DXR and a few other sites (I think) || Erik Rose
| [https://owncloud.org/                       Owncloud] || Open platform to host your cloud under your control || Some communities have been using it to host files under their control (ask Nukeador)
|-
|-
| [https://github.com/mozilla/pdf.js PDF.js]                 || Used as the PDF Viewer in Firefox and Firefox OS || Brendan Dahl, Yury Delendik
| [http://pandoc.org/                           Pandoc] || universal document converter, lua_sandbox_extensions || Mike Trinkala
|-
|-
| [https://github.com/PyCQA/pep8 pep8] || Python linter. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [https://github.com/Parquet/parquet-mr        Parquet-MR] || Parquet-MR contains the java implementation of the Parquet format || Roberto Agostino Vitillo
|-
|-
| [https://www.perl.org/ Perl]                 || Used by Bugzilla || Member of Jonathan Griffin's team
| [https://github.com/apache/parquet-cpp        parquet-cpp] || C++ library to read and write the Apache Parquet columnar data format, lua_sandbox_extensions || Mike Trinkala
|-
|-
| [http://python-pillow.org/ pillow] || Python Imaging library || Member of Webcompat team
| [https://pypi.python.org/pypi/parsimonious/  Parsimonious] || Parsing lib used by DXR and a few other sites (I think) || Erik Rose
|-
|-
| [https://github.com/pypa/pip pip] || Python package tool. Used by all Python projects. || Erik Rose and Jannis Leidel, Jannis is core team member ([https://www.pypa.io/ PyPA])
| [https://github.com/mozilla/pdf.js            PDF.js] || Used as the PDF Viewer in Firefox and Firefox OS || Brendan Dahl, Yury Delendik
|-
|-
| [http://piwik.org/ Piwik] || Analytic software that gives you the control and respects privacy || Some communities have been using it to avoid GA analytics (Ask Nukeador)
| [https://pdfium.googlesource.com/pdfium/     PDFium] || PDF viewing and printing in Firefox || Peter Van Der Beken, Evelyn Hung
|-
|-
| [http://cmusphinx.sourceforge.net/ Pocketsphinx]       || Speech recognition toolkit embedded into Firefox OS|| André Natal
| [https://github.com/PyCQA/pep8                pep8] || Python linter. Used by Treeherder and others. || Member of Jonathan Griffin's team
|-
|-
| [http://www.postgresql.org/ PostgreSQL]       || Open source relational DB used by many developers, adminstered by IT || Selena Deckelmann
| [https://www.perl.org/                       Perl] || Used by Bugzilla || Member of Jonathan Griffin's team
|-
|-
| [https://github.com/PrismJS/prism Prism.js]       || Syntax highlighting on code samples on MDN ||  
| [http://square.github.io/picasso/             Picasso] || Android image fetching framework || Android team
|-
|-
| [https://github.com/puppetlabs/puppet Puppet] || System administration tool || Member of Amy Rich's team, Corey Shield's team
| [http://python-pillow.org/                    pillow] || Python Imaging library || Member of Webcompat team
|-
| [https://github.com/pypa/pip                  pip] || Python package tool. Used by all Python projects. || Erik Rose and Jannis Leidel, Jannis is core team member ([https://www.pypa.io/ PyPA])
|-
| [http://piwik.org/                            Piwik] || Analytic software that gives you the control and respects privacy || Some communities have been using it to avoid GA analytics (Ask Nukeador)
|-
| [http://cmusphinx.sourceforge.net/            Pocketsphinx] || Speech recognition toolkit embedded into Firefox OS|| André Natal
|-
| [http://www.postgresql.org/                  PostgreSQL] || Open source relational DB used by many developers, adminstered by IT || Selena Deckelmann
|-
| [https://github.com/prestodb/presto          Presto] || Distributed SQL query engine for big data. || Roberto Agostino Vitillo
|-
| [https://github.com/PrismJS/prism            Prism.js] || Syntax highlighting on code samples on MDN ||
|-
| [https://www.guardsquare.com/en/proguard      ProGuard] || Java bytecode optimizer; optimizes Firefox for Android || Android team
|-
| [https://github.com/puppetlabs/puppet         Puppet] || System administration tool || Member of Amy Rich's team, Corey Shield's team
|-
|-
| [https://github.com/JetBrains/intellij-community/tree/master/python PyCharm] || Python IDE || Jonathan Griffin
| [https://github.com/JetBrains/intellij-community/tree/master/python PyCharm] || Python IDE || Jonathan Griffin
|-
|-
| [https://github.com/pyflakes/pyflakes pyflakes] || Python linter. Used by Treeherder and others. || Member of Jonathan Griffin's team
| [https://github.com/pyflakes/pyflakes         pyflakes] || Python linter. Used by Treeherder and others. || Member of Jonathan Griffin's team
|-
|-
| [http://pypy.org/ PyPy]                                       || Python language runtime. Used by Web Push service. || Cloud Services, esp. Ben Bangert
| [http://pypy.org/                             PyPy] || Python language runtime. Used by Web Push service. || Cloud Services, esp. Ben Bangert
|-
|-
| [https://github.com/Pylons/pyramid/ Pyramid] || Python Web framework || Cloud Services Team
| [https://github.com/Pylons/pyramid/           Pyramid] || Python Web framework || Cloud Services Team
|-
|-
| [http://pytest.org/ pytest] || Python testing tool. Used by Treeherder and others. || Dave Hunt
| [http://pytest.org/                           pytest] || Python testing tool. Used by Treeherder and others. || Dave Hunt
|-
|-
| Python                                       || Scripting language || [http://python.org/psf/ Python Software Foundation], Selena Deckelmann is a former board member
| [http://python.org/                          Python] || Scripting language || [http://python.org/psf/ Python Software Foundation], Selena Deckelmann is a former board member
|-
|-
| [https://pypi.python.org/pypi/cryptography python cryptography] || cryptography is a package which provides cryptographic recipes and primitives to Python developers. || Cloud Services Team
| [https://pypi.python.org/pypi/cryptography   python cryptography] || cryptography is a package which provides cryptographic recipes and primitives to Python developers. || Cloud Services Team
|-
|-
| [https://pypi.python.org/pypi/pyelasticsearch/ pyelasticsearch] || Python client for elasticsearch || Erik Rose
| [https://pypi.python.org/pypi/pyelasticsearch/ pyelasticsearch] || Python client for elasticsearch || Erik Rose
|-
|-
| [https://python-jose.readthedocs.io/en/latest/ python-jose] || a JavaScript Object Signing and Encryption (JOSE) implementation in python || Cloud Services Team
| [https://python-jose.readthedocs.io/         python-jose] || a JavaScript Object Signing and Encryption (JOSE) implementation in python || Cloud Services Team
|-
| [https://github.com/jrmuizel/qcms            qcms] || Mozilla fork of lcms ||
|-
| [https://www.rabbitmq.com/                    RabbitMQ] || Distributed Queue, used by Socorro, Pulse (all our publicly available build/test/commit information flows through this), Treeherder, addons.mozilla.org (with Celery), marketplace.mozilla.org (with Celery) || Selena Deckelmann, Jason Thomas
|-
| [http://http://rapidjson.org/                RapidJSON] || A fast JSON parser/generator for C++ with both SAX/DOM style API, lua_sandbox_extensions || Mike Trinkala
|-
| [https://pypi.python.org/pypi/raven          Raven] || Raven is a python client for Sentry || Cloud services Team
|-
| [http://facebook.github.io/react/index.html  ReactJS] || Javascript library for building user interfaces. Used by Firefox Hello & DevTools || Mark Banner, Nicolas Perriault
|-
| [https://readthedocs.org/                    Read the Docs] || Hosted automatically-built documentation, used by Cloud Services and a wide variety of mozilla Github projects || Ben Bangert, Jannis Leidel, Gervase Markham
|-
| [https://redash.io/                          redash] || Data analysis and dashboarding tool || Rob Miller
|-
| [http://redis.io/                            Redis] || Really fast data structure store, cache and message broker || Cloud Services Tarek Ziade's team, Loop Server (Hello) team
|-
| [http://redux.js.org/                        Redux] || Redux is a predictable state container for JavaScript apps. || Jason Laster, Nicolas Perriault
|-
| [https://github.com/redux-saga/redux-saga    Redux-saga] || An alternative side effect model for Redux apps. || Nicolas Perriault
|-
| [http://python-requests.org/                  Requests] || "Python HTTP Requests for Humans". Used by many many Mozilla Python projects. || Member of Jonathan Griffin's team
|-
| [https://www.reviewboard.org/                Review Board] || The base of MozReview, the new review tool being developed to replace Splinter || Steven MacLeod, Mike Conley
|-
| [https://github.com/rietveld-codereview/rietveld Rietveld] || Code Review, hosted on Google App Engine, used by Daala team. || Ralph Giles
|-
| [https://github.com/briansmith/ring          Ring] || Safe, fast, small crypto using Rust. || Diane Hosfelt
|-
| [https://chromium.googlesource.com/external/rlz/ rlz] || Library for grouping promotion event signals and anonymous user cohorts ||
|-
| [https://saltstack.com/                      Salt] || Python-based configuration management software. || Jack Moffitt
|-
| [https://sass-lang.com/                      Sass] || CSS Preprocessor. Most big team web projects use Sass these days. ||
|-
| [http://wordlist.aspell.net/                  SCOWL] || en-US word list used for spell checking. || ehsan
|-
| [https://github.com/sctplab/usrsctp          sctp] || SCTP stack ||
|-
| [http://www.seleniumhq.org/                  Selenium] || Browser test driver || David Burns, Dave Hunt
|-
|-
| [https://www.rabbitmq.com/ RabbitMQ]         || Distributed Queue, used by Socorro, Pulse (all our publicly available build/test/commit information flows through this), Treeherder, addons.mozilla.org (with Celery), marketplace.mozilla.org (with Celery) || Selena Deckelmann, Jason Thomas
| [http://sinonjs.org/                         Sinon] || JavaScript mock library || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team
|-
|-
| [http://http://rapidjson.org/ RapidJSON] || A fast JSON parser/generator for C++ with both SAX/DOM style API, lua_sandbox_extensions || Mike Trinkala
| [https://skia.org/                           Skia] || A complete 2D graphic library for drawing Text, Geometries, and Images || Platform Graphics Team
|-
|-
| [https://pypi.python.org/pypi/raven Raven] || Raven is a python client for Sentry || Cloud services Team
| [https://slimerjs.org/                       SlimerJS] || Scriptable browser, based on Gecko, used for functional tests in some few Mozilla projects ( [[PluotSorbet]], some FxOS apps ? and others ?) || Myk Melez
|-
|-
| [http://facebook.github.io/react/index.html ReactJS] || Javascript library for building user interfaces. Used by Firefox Hello & DevTools || Mark Banner
| [https://github.com/apache/spark/            Spark] || Spark is a fast and general cluster computing system for Big Data. || Roberto Agostino Vitillo
|-
|-
| [https://readthedocs.org/ Read the Docs]   || Hosted automatically-built documentation, used by Cloud Services and a wide variety of mozilla Github projects || Ben Bangert, Jannis Leidel, Gervase Markham
| [http://sphinx-doc.org/                       Sphinx] || Documentation builder used for Fathom, DXR, and probably other projects || Erik Rose
|-
|-
| [http://redis.io/ Redis]         || Really fast data structure store, cache and message broker || Cloud Services Tarek Ziade's team, Loop Server (Hello) team
| [http://www.sqlalchemy.org/                   SQLAlchemy] || Database Toolkit and ORM for Python || bhearsum
|-
|-
| [http://redux.js.org/ Redux] || Redux is a predictable state container for JavaScript apps. || Jason Laster
| [https://www.sqlite.org/                     SQLite] || File-based database || asuth
|-
|-
| [http://python-requests.org/ Requests] || "Python HTTP Requests for Humans". Used by many many Mozilla Python projects. || Member of Jonathan Griffin's team
| [http://www.squid-cache.org/                 Squid] || Caching proxy || Brian Hourigan
|-
|-
| [https://www.reviewboard.org/ Review Board]   || The base of MozReview, the new review tool being developed to replace Splinter || Steven MacLeod, Mike Conley
| [https://github.com/cisco/libsrtp            SRTP] || SRTP protocol library ||
|-
|-
| [https://sass-lang.com/ Sass]         || CSS Preprocessor. Most big team web projects use Sass these days. ||
| [http://stanfordnlp.github.io/CoreNLP/       Stanford CoreNLP] || Natural language analysis tools used in FOSS Heartbeat || Don Marti
|-
|-
| [http://wordlist.aspell.net/ SCOWL]         || en-US word list used for spell checking. || ehsan
| [http://learnboost.github.io/stylus/          Stylus] || CSS Pre-processor on several sites || webdev
|-
|-
| [http://www.seleniumhq.org/ Selenium]         || Browser test driver || David Burns, Dave Hunt
| [https://subversion.apache.org/               Subversion] || https://svn.mozilla.org ''(Planning to decommission in near future)'' || Unknown
|-
|-
| [http://sinonjs.org/ Sinon] || JavaScript mock library || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team
| [https://suricata-ids.org/                   suricata] || IDS / IPS / NSM engine || Michal Purzynski
|-
|-
| [https://skia.org/ Skia] || A complete 2D graphic library for drawing Text, Geometries, and Images || Platform Graphics Team
| [http://ternjs.net/                           TernJS] || Code analysis engine for JS ||
|-
|-
| [https://slimerjs.org/ SlimerJS]             || Scriptable browser, based on Gecko, used for functional tests in some few Mozilla projects  ( [[PluotSorbet]], some FxOS apps ? and others ?) || Myk Melez
| [http://threejs.org/                         three.js] || 3D JS library; used by A-Frame || Lars Bergstrom
|-
|-
| [http://www.sqlalchemy.org/ SQLAlchemy]] || Database Toolkit and ORM for Python || bhearsum
| [https://tox.readthedocs.org/en/latest/      Tox] || Test automation || Dave Hunt
|-
|-
| [https://www.sqlite.org/ SQLite]             || File-based database || asuth
| [https://travis-ci.org/                       Travis] || Continuous integration system used by several teams (eg Treeherder) || Jonathan Griffin's team and Lars Bergstrom
|-
|-
| [http://learnboost.github.io/stylus/ Stylus]             || CSS Pre-processor on several sites || webdev
| [https://github.com/twitter/twemoji          twemoji] || Upstream Emoji artwork used in the Firefox built-in Emoji font (minor source) || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])
|-
|-
| [https://subversion.apache.org/ Subversion]   || https://svn.mozilla.org ''(Planning to decommission in near future)'' || Unknown
| [https://unicode.org/                         The Unicode Consortium] || Their work underpins most of what we do || Richard Soderberg
|-
|-
| [https://suricata-ids.org/ suricata]                   || IDS / IPS / NSM engine || Michal Purzynski
| [https://uwsgi-docs.readthedocs.io/en/latest/ UWSGI] || Full hosting stack used in MozDef || MozDef Team in EIS
|-
|-
| [http://www.squid-cache.org/ Squid]           || Caching proxy || Brian Hourigan
| [https://github.com/mitchellh/vagrant        Vagrant]|| Build and distribute dev envs, used by Treeherder and others || Member of Jonathan Griffin's team
|-
|-
| [https://tox.readthedocs.org/en/latest/ Tox] || Test automation || Dave Hunt
| [http://valgrind.org/                         Valgrind] || Memory error detection and profiling of C and C++ code || jseward, njn
|-
|-
| [https://travis-ci.org/ Travis]               || Continuous integration system used by several teams (eg Treeherder) || Jonathan Griffin's team
| [http://www.videolan.org/index.html          VideoLAN] || Free software for multimedia || Timothy B. Terriberry
|-
|-
| [https://uwsgi-docs.readthedocs.io/en/latest/ UWSGI]               || Full hosting stack used in MozDef || MozDef Team in EIS
| [https://github.com/microsoft/vscode/         vscode] || Code editor || unknown
|-
|-
| [https://github.com/mitchellh/vagrant Vagrant]|| Build and distribute dev envs, used by Treeherder and others || Member of Jonathan Griffin's team
| [http://vim.org/                             vim] || editor used by many developers || —
|-
|-
| [http://valgrind.org/ Valgrind]               || Memory error detection and profiling of C and C++ code || jseward, njn
| [https://waffle.io/mozilla/                  waffle.io] || github project management used by various teams ||  
|-
|-
| [https://github.com/microsoft/vscode/ vscode] || Code editor || unknown
| [https://github.com/w3c/web-platform-tests    web-platform-tests] || Testcases and tooling for cross-browser testing of web-platform APIs || jgraham
|-
|-
| [http://vim.org/ vim] || editor used by many developers || —
| [https://webpack.github.io/                   WebPack] || A bundler for javascript and friends || Nicolas Perriault
|-
|-
| [https://waffle.io/mozilla/ waffle.io] || github project management used by various teams ||  
| [http://www.webrtc.org                        WebRTC.org] || Components to support real-time communication in browsers and mobile applications || Randell Jesup
|-
|-
| [https://github.com/w3c/web-platform-tests web-platform-tests] || Testcases and tooling for cross-browser testing of web-platform APIs                                            || jgraham
| [https://github.com/google/woff2              woff2] || Reference library for WOFF font format ||
|-
|-
| [http://www.webrtc.org WebRTC.org]           || Components to support real-time communication in browsers and mobile applications || Randell Jesup
| [http://www.wordpress.org                     WordPress] || Powers our blogs, blog.mozilla.org || Craig Cook
|-
|-
| [http://www.wordpress.org WordPress]         || Powers our blogs, blog.mozilla.org || Craig Cook
| [https://www.webtoolkit.eu/wt                Wt] || C++ library for developing web applications, hindsight_admin || Mike Trinkala
|-
|-
| [https://www.webtoolkit.eu/wt Wt] || C++ library for developing web applications, hindsight_admin || Mike Trinkala
| [https://github.com/kroeckx/x509lint          x509lint] || Certificate checking tool, used by the Root Store team || Kathleen Wilson
|-
|-
| [https://xiph.org Xiph.Org]                   || Media codecs ship in Firefox, encoding tools || Ralph Giles
| [https://xiph.org                             Xiph.Org] || Media codecs ship in Firefox, encoding tools; includes libogg || Ralph Giles
|-
|-
| [https://github.com/Cyan4973/xxHash xxHash] || Extremely fast non-cryptographic hash algorithm, lua_sandbox_extensions || Mike Trinkala
| [https://github.com/Cyan4973/xxHash           xxHash] || Extremely fast non-cryptographic hash algorithm, lua_sandbox_extensions || Mike Trinkala
|-
|-
| [http://tukaani.org/xz/embedded.html XZ Embedded] || Decompressor for the XZ format ||
| [http://tukaani.org/xz/embedded.html         XZ Embedded] || Decompressor for the XZ format ||
|-
|-
| [http://yasm.tortall.net/ yasm] || Assembler used by the build system. || unknown
| [http://yasm.tortall.net/                     yasm] || Assembler used by the build system. || unknown
|-,
| [https://valloric.github.io/YouCompleteMe/    YouCompleteMe] || Code completion engine for vim editors || Ehsan Akhgari
|-
|-
| [https://valloric.github.io/YouCompleteMe/ YouCompleteMe] || Code completion engine for vim editors || Ehsan Akhgari
| [http://zlib.net                              zlib] || Streaming compression and decompression for HTTP, PNG, etc. ||
|-
|-
| [http://zlib.net zlib]                   || Streaming compression and decompression for HTTP, PNG, etc. ||
| [https://blog.zappa.io/                Zappa Serverless Framework] || Framework for porting Flask, Djangon, other python apps to aws Lambda. Used in Risk Heatmap and Second Opinion || Andrew Krug 
|-
|-
| [https://zookeeper.apache.org/ ZooKeeper] || Distributed synchronization, use by hg.mozilla.org replication || gps
| [https://zookeeper.apache.org/               ZooKeeper] || Distributed synchronization, use by hg.mozilla.org replication || gps
|}
|}
Akrug
95

edits

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