Dimdim is an open source web conferencing product with features like Application, Desktop and Presentation sharing with A/V streaming and chat. No installation is needed on the Attendee side and all features are available through a web browser.
features :-
* Presentation and Document sharing: Interactive real-time Collaboration over
documents and presentations allows enhanced expression and exchange of ideas.
* Audio and video sharing
* Application sharing: Full screen
* White board and Annotations: Realistic interactive collaboration
* Chat
* Polls
* Question manager: Question manager which is like a moderated Q&A setup
* Record and Archive
E-Learning: Teachers can conduct classes as web conferences so that physical presence of the teacher as well as students is not necessary. Also the archived sessions can be used by students for later reference as well by the teacher as a teaching tool. Integration with Moodle(Moodle is a course management system (CMS) - a free, Open Source software package http://www.moodle.org/) will be available soon, while integration with other software like Sakai and dotLRN is being explored.
Dimdim is available under Mozilla Public License
1.1(http://dimdim.com/license/Dimdim-MPL.txt) with attribution.
Attendees can use either Internet Explorer 6 or Firefox 1.5 while Presenters can use Internet Explorer 6 or Firefox 1.5 on Windows (XP/2000/2003) only.
Source: http://www.dimdim.com/
For Download:http://sourceforge.net/project/showfiles.php?group_id=176809
Demo :http://www.dimdim.com//index.php?option=com_wrapper&Itemid=71