Active Organizations - NGO
OFSET - www.ofset.org

OFSET - http://www.ofset.org
Software engineering for education
Skolelinux - http://www.skolelinux.org
Software integration
Application server solution
Hispalinux - http://www.hispalinux.es
Various projects related to education
The biggest LUG in Europe (~7 000 members)
A lot of LUG or national organizations active in the promotion but not in the development
And even more active non-aggregated free software developers