MOSS/Foundational Technology/Projects We Use: Difference between revisions

This is a work in progress - please contribute to this list.

! Project !! Description !! Contact within Mozilla

| [https://www.adjust.com/ Adjust] || Mobile app analytics; used to track installs on Firefox for Android & other products || Android & iOS teams

| [http://lcamtuf.coredump.cx/afl/ American Fuzzy Lop] || A security-oriented fuzzer. || Unknown

| [http://angleproject.org/ ANGLE]             || A conformant OpenGL ES implementation for Windows, Mac and Linux || Platform Graphics Team

| [https://angularjs.org/ angular.js]           || Used by A-Team for web apps (eg Treeherder) || Member of Jonathan Griffin's team

| [https://httpd.apache.org Apache Server]     || Used by A-Team for web apps || Member of Jonathan Griffin's team

| [https://github.com/ansible/ansible Ansible] || Used by IT (netops) and A-Team to manage deployments || jbarnell , Webops, GPS?

| [https://github.com/h4writer/arewefastyet AreWeFastYet] || Compare JS performance across JS engines and platforms || Hannes Verschore

| [https://github.com/argonjs Argon] || Used as the foundation for mobile AR web browser research by Emerging Tech || Blair MacIntyre

| [https://atom.io/ Atom]                       || Used (either vanilla or e.g. as [https://github.com/Microsoft/vscode] ) by various developers ||

| [https://babeljs.io/ BabelJS]                 || JavaScript compiler, Used by Gaia, TaskCluster team || Selena Deckelmann

| [https://www.isc.org/downloads/bind/ BIND] || DNS Server || Brian Hourigan

| [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://pypi.python.org/pypi/blessings/ Blessings] || Terminal formatting lib used by mozilla-central build process || Erik Rose

| [http://getbootstrap.com/ Bootstrap] || HTML/CSS/JS framework, used by many of Mozilla's sites. || Webdev

| [http://brew.sh/ brew / Homebrew] || Mac OS X packaging system, used to install dev tools || Sam Penrose

| [https://bro.org bro]                   || The Bro Network Security Monitor || Michal Purzynski

| [http://browserify.org Browserify]                   || Build JS dependencies for the browser || mozilla-services (kinto.js)

| [http://buildbot.net/ BuildBot]               || The base system currently in use for release || Dustin J. Mitchell

| [http://bugzilla.org/ Bugzilla] (upstream)    || The base Bugzilla on that we customize for Mozilla's use || Mark Côté

| [https://www.cairographics.org/ Cairo] || Vector graphics-based, device independent API. || Jeff Muizelaar

| [https://ccache.samba.org/ ccache] || A compiler cache. || Ted Mielczarek

| [http://www.celeryproject.org/ Celery] || Distributed task queue. Used by Treeherder and others. || Member of Jonathan Griffin's team

| [http://cffi.readthedocs.io/en/latest/ cffi] || C Foreign Function Interface for Python. || Cloud Services Team

| [http://ckeditor.com/ CKEditor] || WYSIWYG editor on MDN ||  

| [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://chaijs.com/ Chai] || JavaScript test and assertion library || Cloud Services, Tarek Ziade's team (kinto.js), Firefox Hello team

| [https://bitbucket.org/chromiumembedded/cef Chromium Embedded Framework] || A simple framework for embedding browsers in other applications || Jack Moffitt

| [http://www.llvm.org Clang/LLVM]           || C/C++ compiler and infrastructure || Ehsan Akhgari & Sylvestre Ledru

| [https://codemirror.net/ CodeMirror]           || Used in DevTools, [https://thimble.mozilla.org Thimble], and other online code tools || David Humphrey/Simon Wex

| [https://pypi.python.org/pypi/cookiecutter/ Cookiecutter] || Templating system used to clone our [https://github.com/mozilla/sugardough Sugardough] Django template || Giorgos Logiotatidis

| [https://gcc.godbolt.org/ Compiler Explorer - C++] || Online C++ compiler with assembly output. Used by devs to test&optimize code snippets. || Unknown

| [https://rust.godbolt.org/ Compiler Explorer - Rust] || Online Rust compiler with assembly output. Used by devs to test&optimize code snippets. || Unknown

| [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://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

| [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://eclipse.org/ Eclipse] || Integrated Development Environment 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

| [https://github.com/ether/etherpad-lite Etherpad]     || Used for meeting notes, etc || JP Schneider

| [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

| [http://flask.pocoo.org/ Flask]               || Python web framework || Erik Rose

| [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

| [http://fontforge.github.io/en-US/ FontForge] || Built-in Emoji font compilation || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])

| [https://pypi.python.org/pypi/FontTools FontTools] || Built-in Emoji font compilation || Tim Chien ([https://github.com/mozilla/emojione-colr See emojione-colr])

| [http://foundation.zurb.com/ Foundation Framework] || Responsive front-end framework, used by some Mozilla sites and add-ons || Luke Crouch

| [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

| [http://gcc.gnu.org GCC]                     || C/C++ compiler and infrastructure || Nathan Froyd

| [http://https://www.sourceware.org/gdb/ GDB] || The GNU Debugger, the sole debugger for Linux || Jim Blandy

| [https://git-scm.com/ Git]                   || Version control system - https://git.mozilla.org || Unknown  

| [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

| [https://github.com/apache/hbase/ HBase] || HBase is an open-source, distributed, versioned, column-oriented store modeled after Bigtable. || Roberto Agostino Vitillo

| [http://homu.io/ Homu] || A bot that integrates with your favorite continuous integration service || Jack Moffitt

| [http://hunspell.sourceforge.net/ Hunspell] || Spellchecking engine || Ehsan Akhgari

| [https://github.com/hunspell/hyphen/ Hyphen] || Hyphenation library || Jonathan Kew

| [https://github.com/jkbrzt/httpie HTTPie] || HTTP command-line client || Cloud Services (among many others), Tarek Ziade's team

| [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://hyper.rs/hyper/v0.10.0/hyper/index.html Hyper] || A fast, modern HTTP implementation written in and for Rust. || 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://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

| [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/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

| [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://kombu.readthedocs.org/ Kombu] || Messaging library for Python. Used by Treeherder and others. || Member of Jonathan Griffin's team

| [https://www.latex-project.org/ LaTeX] || A document preparation system. || Alan Jeffrey (ajeffrey)

| [https://github.com/square/leakcanary Leak Canary] || Android memory leak detection framework || Android team

| libbz2                                       || Compression library for .bz2 format || Julian Seward

| [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

| [https://sourceware.org/libffi/ libffi] || A Portable Foreign Function Interface Library. || Platform team

| [http://libjpeg-turbo.virtualgl.org/ libjpeg-turbo] || JPEG decoding library || Jeff Muizelaar  

| [http://www.libpng.org/pub/png/libpng.html libpng] || PNG decoding library || Jeff Muizelaar  

| libvpx (Google)                               || Library for support of Google’s VP* family of codecs || Tim Terriberry  

| Linux                                        || OS kernel used in Firefox OS || Unknown  

| 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://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.mesa3d.org/ Mesa] || 3D graphics library used by Servo & Gecko || Unknown

| [https://www.meteor.com/ Meteor]   || Build Apps with Javascript - Used in MozDef's Web UI ||  MozDef Team in EIS

| [http://mochajs.org/ Mocha] || JavaScript test runner || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team

| [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

| [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

| [http://netsniff-ng.org/ netsniff-ng]                   || Linux networking toolkit || Michal Purzynski

| [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. || Jack Moffitt

| [https://nixos.org/Nix Nix] || Reproducible build tool. || Rok Garbas (garbas), Release Engineering Team

| [https://nixos.org NixOS]                     || Reproducible Linux distribution. Used by some developers || Nicolas B. Pierron

| [https://www.nginx.com/resources/wiki/contributing/github/ nginx] || Web Server. Used by almost everything CloudOps runs. || Travis Blow

| [https://nodejs.org Node.js]                 || JavaScript runtime for server side applications, command line utilities || Nick Desaulniers

| nrappkit                                      || Toolkit for building standalone applications || Unknown

| [http://nsis.sourceforge.net/Main_Page NSIS] || Windows installer framework || Matt Howell

| [https://wiki.mozilla.org/NSS NSS] || Network Security Services || jcjones?  

| [https://www.gnu.org/software/octave/ Octave] || Numerical analysis/mathematics software. || Jean-Marc Valin

| [https://github.com/cisco/OpenH264 OpenH264] (Cisco)                              || H.264 video library || Unknown  

| [http://www.openLDAP.org/ OpenLDAP]                 || User management used by Infra || :jabba?

| [http://openresty.org OpenResty]             || a fast web app server by extending nginx, used by cloudops || Benson Wong (mostlygeek)

| [http://www.openssh.com/ OpenSSH]                 || Remote server management, secure transport for Git and Mercurial || Unknown

| [http://openssl.org/ OpenSSL]                 || Cryptograpahy and TLS Toolkit || Nick Desaulniers

| [https://www.openstreetmap.org OpenStreetMap]     || Online/offline maps, used by the location service and on mozilla.org || Unknown

| [https://openvpn.net/ Openvpn]                 || VPN used by Infra || :jabba?

| [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.owasp.org/index.php/ZAP OWASP ZAP]                 || Web security testing tool used by security and QA teams || Simon Bennetts (psiinon)

| [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)

| [http://pandoc.org/ Pandoc] || universal document converter, lua_sandbox_extensions || Mike Trinkala 

| [https://github.com/Parquet/parquet-mr Parquet-MR] || Parquet-MR contains the java implementation of the Parquet format || Roberto Agostino Vitillo

| [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://pypi.python.org/pypi/parsimonious/ Parsimonious] || Parsing lib used by DXR and a few other sites (I think) || Erik Rose

| [https://github.com/mozilla/pdf.js PDF.js]                 || Used as the PDF Viewer in Firefox and Firefox OS || Brendan Dahl, Yury Delendik

| [https://pdfium.googlesource.com/pdfium/ PDFium]           || PDF viewing and printing in Firefox || Peter Van Der Beken, Evelyn Hung

| [https://github.com/PyCQA/pep8 pep8] || Python linter. Used by Treeherder and others. || Member of Jonathan Griffin's team

| [https://www.perl.org/ Perl]                 || Used by Bugzilla || Member of Jonathan Griffin's team

| [http://square.github.io/picasso/ Picasso] || Android image fetching framework || Android 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/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

| [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

| 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/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://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. || Ralph Giles

| [https://github.com/briansmith/ring Ring] || Safe, fast, small crypto using Rust. || Diane Hosfelt

| [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

| [http://www.seleniumhq.org/ Selenium]         || Browser test driver || David Burns, Dave Hunt

| [http://sinonjs.org/ Sinon] || JavaScript mock library || Cloud Services, Tarek Ziade's team (kinto.js); Firefox Hello team

| [https://skia.org/ Skia] || A complete 2D graphic library for drawing Text, Geometries, and Images || Platform Graphics 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

| [https://github.com/apache/spark/ Spark] || Spark is a fast and general cluster computing system for Big Data. || Roberto Agostino Vitillo

| [http://sphinx-doc.org/ Sphinx]             || Documentation builder used for Fathom, DXR, and probably other projects || Erik Rose

| [http://www.sqlalchemy.org/ SQLAlchemy]] || Database Toolkit and ORM for Python || bhearsum

| [https://www.sqlite.org/ SQLite]             || File-based database || asuth

| [http://www.squid-cache.org/ Squid]           || Caching proxy || Brian Hourigan

| [http://stanfordnlp.github.io/CoreNLP/ Stanford CoreNLP] || Natural language analysis tools used in FOSS Heartbeat || Don Marti

| [http://learnboost.github.io/stylus/ Stylus]             || CSS Pre-processor on several sites || webdev

| [https://subversion.apache.org/ Subversion]   || https://svn.mozilla.org ''(Planning to decommission in near future)'' || Unknown

| [https://suricata-ids.org/ suricata]                   || IDS / IPS / NSM engine || Michal Purzynski

| [https://tox.readthedocs.org/en/latest/ Tox] || Test automation || Dave Hunt

| [https://travis-ci.org/ Travis]               || Continuous integration system used by several teams (eg Treeherder) || Jonathan Griffin's team

| [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://uwsgi-docs.readthedocs.io/en/latest/ UWSGI]               || Full hosting stack used in MozDef || MozDef Team in EIS

| [https://github.com/mitchellh/vagrant Vagrant]|| Build and distribute dev envs, used by Treeherder and others || Member of Jonathan Griffin's team

| [http://valgrind.org/ Valgrind]               || Memory error detection and profiling of C and C++ code || jseward, njn

| [http://www.videolan.org/index.html ViodLAN] || Free software for multimedia || Timothy B. Terriberry

| [https://github.com/microsoft/vscode/ vscode] || Code editor || unknown

| [http://vim.org/ vim] || editor used by many developers || —

| [https://waffle.io/mozilla/ waffle.io] || github project management used by various teams ||  

| [https://github.com/w3c/web-platform-tests web-platform-tests] || Testcases and tooling for cross-browser testing of web-platform APIs                                            || jgraham

| [https://webpack.github.io/ WebPack]           || A bundler for javascript and friends || Nicolas Perriault

| [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

| [https://www.webtoolkit.eu/wt Wt] || C++ library for developing web applications, hindsight_admin || Mike Trinkala

| [https://xiph.org Xiph.Org]                   || Media codecs ship in Firefox, encoding tools || Ralph Giles

| [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://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

| [http://zlib.net zlib]                   || Streaming compression and decompression for HTTP, PNG, etc. ||

| [https://zookeeper.apache.org/ ZooKeeper] || Distributed synchronization, use by hg.mozilla.org replication || gps