Apache OpenMeetings is a multi-language customizable video-conferencing and collaboration system. It supports audio/video and allows you to see the desktop of any participant. It includes a whiteboard, the ability to import a variety of image formats, invitations, a moderation system, backup and language modules, private and public conference rooms, and the ability to record meetings. The project also provides integrations for Asterisk, Jira, Confluence, Moodle, Sakai, and SugarCRM, and connectors for LDAP and ADS.
ConcourseConnect is a social networking platform. You can build social networking sites including corporate intranets, business community add-on sites, enthusiast sites, business or product directory sites (like a chamber of commerce or yellow pages), or even stand-alone Web sites. Features include a full range of Web 2.0 tools: ratings, reviews, wiki, blog, comments, discussion forums, an ideas engine, and more. Users begin by creating a rich profile and joining groups. It is perfect for internal collaboration or as a customer feedback forum. The portal framework allows developers to plug in custom portlets and themes.
BigBlueButton is a Web conferencing system that focuses on usability, modularity, and clean design, both for the user and developer. It implements real-time sharing of voice, Web cams, desktops, slides, and chat messages to provide remote students with a high-quality learning experience. Unlike other conferencing systems, the desktop sharing works on Mac OS X, Unix, and PC computers, and there is no hard-coded limit on the number of simultaneous Web cams.
Kune is a distributed social network focused on collaboration rather than just on communication. It focuses on online real-time collaborative editing (Wave-based), decentralized social networking (federation), and Web publishing, while focusing on workgroups rather than just on individuals. It aims to create online spaces for collaborative work where organizations and individuals can build projects online, coordinate common agendas, set up virtual meetings, publish on the Web, and join organizations with similar interests. It has a special focus on Free Culture and social movements needs.