Tor
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Tor Project: Relay Configuration Instructions
The Tor network relies on volunteers to donate bandwidth. The more people who run relays, the faster the Tor network will be. If you have at least 50 kilobytes/s each way, please help out Tor by configuring your Tor to be a relay too. You can run a Tor relay on pretty much any operating system. Tor relays work best on Linux, OS X Tiger or later, FreeBSD 5.x+, NetBSD 5.x+, and Windows Server 2003 or later.
(H)activism
Web activists around the world
torchat - Project Hosting on Google Code
To avoid any potential confusion: This product is produced independently from the Tor® anonymity software, I am not related with or sponsored by torproject.org. TorChat is making use of the Tor® client software and the Windows version comes bundled with original Tor binaries but TorChat itself is a completely separate project developed by different people. TorChat is released as Free Software (GPL).