Speaking as a huge fan of groupware in all of its forms, I think that what OpenGroupware has to offer is simply dynamite.

Mission: To create, as a community, the leading open source groupware server to integrate with the leading open source office suite products and all the leading groupware clients running across all major platforms, and to provide access to all functionality and data through open XML-based interfaces and APIs.

Historical Background

MDlink GmbH, the original author of the OpenGroupware.org reference server, was founded as an Internet service provider (ISP) in Germany in 1994. The company started development on the LSOffice application server in about 1996 to extend it’s Internet offerings with a powerful collaboration platform usable over the Internet.

Some years later LSOffice was renamed to SKYRiX 3 and finally in 2000 a separate company, SKYRIX Software AG, was forked to concentrate on the further development of the product. [Read the rest]