Skype uses P2P (peer-to-peer) technology to provide voice- and video-based communication with other Internet users. The technology is extremely advanced, but easy to use. It features excellent sound quality, end-to-end encryption, and automatic negotiation of firewalls or routers. Among major features are SkypeOut and SkypeIn, adding the possibility to make low-cost calls to land line phones and having a fixed number to be able to receive calls from land line phones.
centericq is a text mode menu- and window-driven IM interface that supports the ICQ2000, Yahoo!, AIM, IRC, MSN, Gadu-Gadu, and Jabber protocols. It allows you to send, receive, and forward messages, URLs, SMSes (both through the ICQ server and email gateways supported by Mirabilis), contacts, and email express messages, and it has many other useful features. An internal RSS reader and a LiveJournal client are also provided.
ProjectForum is a commercially supported, high quality wiki collaboration server for small and medium workgroups. It runs securely on an organization's own network, keeping important information safely in-house and protected. Supporting multiple workgroups from a single server, it features full version control, secure authentication options, document management, full branding support, and much more. ProjectForum is affordable, easy to set up, easy to learn, and easy to use for any workgroup.
CourseForum is Web-based e-learning software that makes it easy for you and your students to interact, whether to create, post, share, or discuss course content. With just their Web browser, students use Courseforum to get answers to questions, dig deeper into issues, and work on projects at any time and from anywhere, not just when classes meet. It is powerful but easy to setup and use. Downloadable and hosted versions are available.
Hasciicam makes it possible to have live ASCII video on the Web. It captures video from a TV card and renders it into ASCII, formatting the output into an HTML page with a refresh tag or in a live ASCII window or in a simple text file as well, giving anyone that has a bttv card, a Linux box, and a cheap modem line the ability to show a live asciivideo feed that can be browsable without any need for a plugin, Java, etc.
Chat Everywhere is a simple and powerful chat client/server system for Web pages. It supports channel administration, IRC-like commands, connection filtering, extensive logging, and much more. The client works in any Web browser that can run Java applets. The server is written in POSIX-compliant C and runs on any kind of Unix.
Gangplank is a Computer Mediated Communication (CMC) system (or "chat server") which supports real-time communication between users, currently using a text-based user interface. It runs as an Internet server which implements the standard telnet protocol, so no special client program is necessary for users. Server-side processing provides input editing/history and terminal- handling features over the telnet connection for standard ANSI terminals. This code has been in production use on a private server since early 1993. This single-process server is fast, efficient and stable.
RAT is an RTP audio conferencing and streaming application that allows users to particpate in point-to-point and multi-point audio conferences over the Internet. Developing features include multiple sampling rates, mono/stereo, loss concealment, and IPv4/IPv6 support, and both versions feature encryption and run on a range of platforms.