dimdim 
Posted on September 30, 2007
An open source web meeting service
dimdim is the world’s first free web meeting service based on the open source platform. dimdim is a browser-based web 2.0 service that allows anybody to share their desktop, show slides, as well as talk, listen, chat, and broadcast via webcam. dimdim’s hosted service is available for free and can be easily used for small gatherings, to seminars with hundreds of attendees. With absolutely no software to download for attendees, dimdim gives everyone the opportunity to hold Web meetings and to customize and brand these meetings.