FLE

“Fle3 is a web-based learning environment. To be more specific Fle3 is server software for computer supported collaborative learning (CSCL). Fle3 is Open Source and Free Software released under the GNU General Public Licence (GPL). The licence is protecting your freedom to use, modify and distribute Fle3.”

http://fle3.uiah.fi/

(ARGH! Free software just keeps doing this to me! ;) )