SILC (Secure Internet Live Conferencing) is a protocol which provides secure conferencing services in the Internet. It can be used to send any kind of messages, in addition to normal text messages. This includes multimedia messages like images, video, and audio stream. All messages in the SILC network are encrypted and authenticated, and messages can also be digitally signed. SILC protocol supports AES, SHA-1, PKCS#1, PKCS#3, X.509, OpenPGP, and is being developed in the IETF. The software is delivered as SILC Client for end users, SILC Server for system administrators, and SILC Toolkit for application developers.
Ekiga (formely known as GnomeMeeting) is a soft phone, video conferencing, and instant messenger application for use over the Internet. It supports HD sound quality and video up to DVD size and quality. It is interoperable with many other standards compliant software, hardware, and service providers as it uses both of the major telephony standards, SIP and H.323.
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.
MetalServe is a standalone DCC file server that can be used to share files on Internet Relay Chat (IRC) networks such as EFNet and Undernet. Unlike the only available similar Unix program, iroffer, which offers "packs" of files, MetalServe offers single files similar to the way the SDFind, SPRJukebox, and OmenServe scripts for mIRC, a Windows IRC client, work.
MPN (Matrix Public Net) is a peer2peer network, based on people that trust each other. Messages are broadcasted over these links between the members of the net. Everyone gets the messages from friends and other persons he or she trusts. Then they are recommended to the ones that trust him/her. At each step the credibility of a message is decreased and if it is too small, the message is discarded and not recommended to friends. Part of the MPN is a XMMS/Winamp-Plugin that puts newsblocks into your music, whether it is Internet radio or MP3s from your hard disk/CD-ROM. The news are coming from your friends and other trustworthies (and from the friends of those, and so on). To publish a message you use the greporter program, which lets you easily record an audio message though a microphone.
xchat_speak is a small Perl script designed to be used with xchat to act as a bridge between it and the Festival Speech Synthesis System. Using it allows you to listen to IRC conversations rather than just reading them. This turns out to be quite useful if you want to get on with something else while IRCing.