QuickChatter is a local lan collaboration tool written in Qt.
The goal of the project is to provide a local LAN tool for chatting, exchanging files, sharing workspace and more.
Application sharing software that allows individual windows to be replicated to other computers. Remote collaboration tool based on a modified VNC protocol. Its advantage is to keep some things, like email, private, while sharing other desktop apps.
OpComm - The Operational Communicator - a IM/collaboration software which should help developers do realtime design and development collaboration even being in distant places of the world, or game players to communicate efficiently during a network game.
Spicebird is an open-source email and collaboration suite based on the Mozilla platform. It provides integrated e-mail, contacts, calendaring and instant messaging. It can connect to any SMTP/IMAP email server, CalDav Calendar server and Jabber serve