The most complete Open Source Java CRM + GroupWare suite including: sales automation, customer service, intranet, email marketing, content management, bug tracker, project manager, social networks integration, webmail, calendar, forums, file sharing.
Diverse P2P Filesharing
PeerProject is a versatile peer-to-peer filesharing client and file manager. Intuitive and aesthetic while supporting many networks and features. BitTorrent, G2, Gnutella, eDonkey, DC++, IRC, http/ftp & more. Mainstream fork of Shareaza p2p, for Windows & WINE. (See Envy fork for further development.)