At OFSET - Case studies - Gcompris [2]
OFSET - www.ofset.org
A BOARD ACTIVITIES SOFTWARE FOR PRIMARY 
http://www.ofset.org/gcompris

A software engineering project 
A modular design with a plug-in architecture
Contributions are:
Translations
Graphic and sound arts
Several plug-in activities
Incubated at several places
Source code at Gnome CVS
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