GStreamer

Preferred license: GNU Library or Lesser General Public License (LGPL)
GStreamer is the de-facto standard multimedia framework for Unix and Linux systems. Thanks to recent advances GStreamer is also gaining traction as a cross-platform multimedia system with adopters such as Songbird and Pioneer.
Actual source code produced by the student participants in Google Summer of Code™ for GStreamer can be found here.
 
Current Projects
by Thiago Sousa Santos, mentored by Wim Taymans
by Brandon J Lewis, mentored by Edward Hervey
by Richard Spiers, mentored by Olivier Crête
by Roberto Fagá Jr, mentored by Stefan Kost