522 organizations since 2016

• 

  Wagtail

  Web

  We build Wagtail, a popular content management system. It's built on Python, by an active and engaged open source community, which has grown rapidly since Wagtail's release in 2014. Wagtail is available in over 40 languages, and used by some of the world's best-known organizations, including NASA, Google, Mozilla, MIT, and the UK's National Health Service, as well as museums, universities, non-profits, governments, banks, studios, restaurants, startups and bloggers around the world.

  2026

  4

  Cycles

  5

  Projects

  15

  Trend

  PythonJavaScriptDjango
• 

  webpack

  Web

  webpack is THE build tool for modern web applications run on NodeJS webpack is a module bundler. Its main purpose is to bundle JavaScript files for usage in a browser, yet it is also capable of transforming, bundling, or packaging just about any resource or asset.

  2026

  3

  Cycles

  6

  Projects

  13

  Trend

  JavaScriptNode.jsWeb DevelopmentHTML5/CSS3+5
• 

  Wellcome Sanger Tree of Life

  Science and medicine

  Genome analysis for all species

  2026

  –

  Cycles

  3

  Projects

  8

  Trend

  PythonJavaScriptRustNextflow+3
• 

  Wikimedia Foundation

  Web

  Wikimedia strives to bring about a world in which every single human being can freely share in the sum of all knowledge; through various projects, chapters, and the support structure of the non-profit Wikimedia Foundation. Wikimedia officially supports 13 projects, including Wikipedia, the seventh most popular site on the internet. Wikipedia receives over 20 billion global page views every month and is available in over 300 languages. The tech behind it ensures that our projects are fast, reliable, and open to all. We design and build the open-source technology that powers Wikimedia projects from hosting Wikipedia to creating edit-checking artificial intelligence (AI). Community volunteers and Foundation technologists collaborate on MediaWiki, which makes sharing free knowledge possible. Read more about Wikimedia on our homepage: https://wikimediafoundation.org/

  2026

  8

  Cycles

  10

  Projects

  93

  Trend

  JavaScriptHTMLPHPCSS+6
• 

  WSO2

  Other

  Comprehensive and open source middleware platform that spans the breadth of SOA

  2026

  –

  Cycles

  2

  Projects

  20

  Trend

  JavaWeb ServicesMiddlewareSoa+1
• 

  Xfce

  Operating systems

  Lightweight and flexible linux desktop environment

  2026

  –

  Cycles

  2

  Projects

  5

  Trend

  CPythonJavaScriptGTK+1
• 

  XMPP Standards Foundation

  End user applications

  XSF develops an open-standard messaging protocol

  2026

  –

  Cycles

  6

  Projects

  11

  Trend

  JavaScriptJavaC++Xmpp+11
• 

  xpra

  Media

  screen for X11, remote access for MS Windows and Mac OS

  2026

  –

  Cycles

  2

  Projects

  0

  Trend

  PythonCythonJavaScriptCompression+2
• 

  XWiki

  Web

  The Advanced Open Source Enterprise Wiki

  2026

  –

  Cycles

  8

  Projects

  12

  Trend

  JavaScriptJavaHTML5CSS3+2
• 

  Zendalona

  End user applications

  FOSS accessibility solutions for visually impaired

  2026

  –

  Cycles

  2

  Projects

  10

  Trend

  PythonJavaScriptAndroidGTK+1
• 

  Zenodo

  Science and medicine

  A free and open digital archive for the long-tail of science.

  2026

  –

  Cycles

  1

  Projects

  2

  Trend

  PythonPostgreSQLFlaskAngularjs+1
• 

  Zulip

  End user applications

  Zulip is the only modern team chat app that is ideal for both live and asynchronous conversations. Zulip has a web app, a cross-platform mobile app for iOS and Android, cross-platform desktop and terminal apps, and over 100 native integrations. The entire Zulip codebase is 100% open source.

  2026

  11

  Cycles

  11

  Projects

  146

  Trend

  PythonJavaScriptDjangoAndroid+6

Contributor counts are accepted projects per cycle.