PowerMeeting is a Web-based synchronous groupware framework. It also refers to a research prototype that demonstrates the kind of groupware built with the framework. Such groupware allow participants to plan, perform, and coordinate their synchronous collaboration.
Working with Tine 2.0 is fun and eases the workaday life!
Due to its enormous user acceptance it activates synergies in your whole organisation.
Tine 2.0 is an open source business collaboration software covering Groupware, CRM and ERP aspects.
Zimbra is open source server and client software for messaging and collaboration - email, group calendaring, contacts, and web document management and authoring. The Zimbra server is available for Linux, Mac OS X, appliances, and virtualization platforms. The Zimbra Web 2.0 Ajax client runs on Firefox, Safari, and IE, and features easy integration / mash-ups of web portals, business applications, and VoIP using web services.