Dokeos is an Open Source elearning and course management web application translated in 34 languages and helping more than 1.000 organisations worldwide to manage learning and collaboration activities.
Moodle is a course management system (CMS) - a free, Open Source software package designed using sound pedagogical principles, to help educators create effective online learning communities. You can download and use it on any computer you have handy (including webhosts), yet it can scale from a single-teacher site to a 50,000-student University. This site itself is created using Moodle, so check out the Moodle Demonstration Courses or read the latest Moodle Buzz.
Also very powerful: Claroline is an Open Source eLearning and eWorking platform allowing organizations to build effective online courses and to manage learning and collaborative activities on the web. Translated into 35 languages, Claroline has a large worldwide users’ and developers’ community.
Looks very nice and powerful! "Welcome to OLAT - the web-based Open Source Learning Management System (LMS). OLAT is open source, 100% Java and completely free of charge.
The development of OLAT started 1999 at the University of Zurich, Switzerland where it is the strategic learning management system and deployed on the main OLAT server. The University of Zurich leads the further development and has a team of 12 developers pushing OLAT to the next level."