1.TCExam – AGPL license, which can be a hassle. Built on PHP/MySQL.
Feature-wise it’s fairly average, strictly an exam system, with multi-language support.
URL: http://sourceforge.net/projects/tcexam/
2. eFront – Refreshing eLearning
Screenshots look pretty good. Homepage: http://sourceforge.net/projects/efrontlearning/
Alternative homepage: http://www.efrontlearning.net/
3. WEB-SET CAMPUS
http://sourceforge.net/projects/web-set-campus/
4. GARC – An eLearning System
http://sourceforge.net/projects/garc/
5. Testa OTMS
http://sourceforge.net/projects/testa-otms/