Tux4Kids

Preferred license: GNU General Public License (GPL)
A group of volunteers that develop and maintain multi-platform open source educational software for children: the award-winning, multi-lingual Tux Paint drawing program; the Tux Typing typing tutor game; and Tux, of Math Command, an arcade-style math skill tester.
Actual source code produced by the student participants in Google Summer of Code™ for Tux4Kids can be found here.
 
Current Projects
by Andrew Corcoran, mentored by Caroline Ford
by Mobin Mohan, mentored by Sreerenj B
by Mager Hois Jesus Manuel, mentored by Timothy E. Holy
by Sreyas K, mentored by Prince K Antony
by Reilly Watson, mentored by Martin Fuhrer
by Brendan Luchen, mentored by David Stuart Bruce
by Bruno Luis Goncalves Dilly, mentored by Schrijvers Luc
by Arunodai Reddy Vudem, mentored by Mark K. Kim
by Adam Rakowski, mentored by Bill Kendrick