Moodle
From the official Moodle website:
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 University with 200,000 students.
To learn more about this e-learning solution and all the other e-learning solutions that Wallanet offers go here: http://www.wallanet.com/open_source_packages/e_learning
Price: $0.00