Moodle, Dokeos and Nicenet

www.dokeos.com
Dokeos is an e-learning and course management web application. It is free software (GNU GPL). It is famous for its user friendliness, consistency, a tool for good learning and interoperability. Teachers can create, manage and publish their course materials through the web so that students can follow courses ("My courses"), read content or participate actively through groups, forums, chat. Dokeos allows you to work cooperatively so that you can share your ideas and learn more. For each course a tutor can define a learning path that structures the course content. It is possible to add SCORM 1.2 or AICC modules, incl. transformed Powerpoint/Impress presentations with the additional software Oogie.
www.nicenet.org
It is similar to dokeos in some aspects; FREE service for high school students where teachers can post documents and assignments and students can discuss assignments and classroom work. It also allows the users to communicate and ask for help. The 'Internet Classroom Assistant' consists of forums, event scheduling, document sharing, personal messaging, and link sharing. Teachers can set up a site for their class in a few minutes and get a key which will allow the students to log into the class. Nicenet.org provides you with some useful functions: conferencing, link sharing and documents.
www.moodle.org
The word Moodle was originally an acronym for Modular Object-Oriented Dynamic Learning Environment. Like dokeos and nicenet, moodle.org is a course management system (CMS). It is free software package designed using sound pedagogical principle, to help educators create effective online learning communities.
By using Moodle, teachers can create and share activities for their students whenever they want through Internet. Moodle provides students and teachers with the opportunity to enjoy the time and space to provide thoughtful and detailed feedback to o¬ne another.