oSIP implements the Session Initiation Protocol (published by IETF as RFC 3261). It can provide signalling capabilities for multimedia applications (IP phones, etc.). It provides a fully usable parser for the SIP syntax and implements the "transaction layer" as defined in the draft. It also provides an SDP parser and extra features for the User Agent. It can be used to build both proxy and IP phones.
The Interverse is the evolution and combination of the Web, chat, instant messaging (IM), and voice communication. It is not just a graphical user interface (GUI), but an immersive user interface (IUI). The Interverse is a virtual universe running on top of the Internet. It uses the Crystal Space 3D engine to render the user's view of the world.
Tulka is a Java-based communication tool designed for e-learning with an integrated chat and a shared whiteboard. It is possible to upload and display of various (ps, dvi, pdf, rtf, html, doc) document formats to the whiteboard. Only a Java enabled Web browser is required on the client side, so there is no need to install anything on the client side.
Talk To The Nose is an instant messaging server which is compatible with the MSN Messenger protocol. It supports all MSN Messenger operations, including group management, file transfers, and instant messaging. It can optionally use an external database, and supports PostgreSQL, MySQL, and MS SQLServer.
BBSzilla is an extension for Mozilla-based browsers such as the Mozilla Application Suite and Firefox. It gives the browser the ability to connect to Bulletin Board Systems that utilize TCP/IP, such as Hotline servers. There is functionality for multi-user chat, single-user messaging, as well as server-side and P2P file sharing, threaded news, single-thread bulletins, and more.
The Floranta AJAX libraries are used to build Rich Client Wikis. Editable sticky notes can be created and positioned over any Web page (even plain HTML), and are capable of behaving as if they stored their entire state in the page. Floranta enables collaborative teamwork and creative activities like cartooning and collage creation, personal notes, ToDo lists, and blogging.