A SSH based chatroom framework; inspired by "ssh-chat" project.
This framework support not only the IRC-like command line interface, but also custom clients by providing an API.
Unlike the public chat-room of ssh-chat, this implementation requiring all users must be authenticated by public key before starting a chat; however public chatrooms are still possible by hacking OpenSSH server, see Wiki page 'Public Chatroom' for details.
CURE provides a web-based environment for distributed collaboration. It was designed for lerning groups but is now also used to support busines collaboration. It combines wiki ideas with mailing lists, shared folders, chats, and room metaphors.
The Floranta libraries provide components for building Rich Client Wikis using AJAX or Java. Floranta clients can be embedded in any webpage (even plain html) and allow users to leave notes, images, cards, etc on the pages. Eg: http://www.floranta.com