BLACK use peer-to-peer technology to operate with no central authority
Contao Open Source CMS (fka TYPOlight)
Web-based HTML5 Media Player
Web-based HTML5 Photo Viewer
Drupal Social Network mod
The leading Open Source survey tool
Notepad++ project is moving to GitHub:
Open Source photo Library Software
Free and open source webmail software
TuxWordSmith uses XDXF dictionaries to play in 88 languages
eyeOS first versions published as Open Source.