Program: Soulseek
License: Freeware
Description: Soulseek® is a unique ad-free, spyware free, and just plain free file sharing application.
One of the things that makes Soulseek® unique is our community and community-related features. Based on peer-to-peer technology, virtual rooms allow you to meet people with the same interests, share information, and chat freely using real-time messages in public or private.
Soulseek®, with its built-in people matching system, is a great way to make new friends and expand your mind!
Website: http://slsknet.org/
There was an old version of the launcher in the forums here, but it is no longer hosted and needs to be updated to work correctly. I have a copy of the old launcher if anybody would like to take a look at it. It leaves a folder behind in %ProgramData%. It was also hastily thrown together and could probably have been much better.