WohlSoft Forums

First of all I want to say that by "free", (as the famous quote goes) I mean freedom, and not as in free beer.

The following are some sites that offer music under "open" licenses. I guess they are already well known, but just to bring it to the notice of anyone who is interested, here they are :

[*] Jamendo - Jamendo calls itself "the largest royalty-free music catalog in the world". All (or most) of the music is licensed under the creative commons licenses. http://www.jamendo.com/en/faq

[*] http://www.freesound.org/ - freesound.org has a huge variety of sounds, all licensed under the creative commons licenses. http://www.freesound.org/help/faq/#freesound-0

[*]ccmixter - ccmixter's about page describes it as "a community music remixing site featuring remixes and samples licensed under Creative Commons licenses." http://ccmixter.org/about

sources/more links
http://supertuxkart.sourceforge.net/Licensing#Where_to_find_files
http://www.hongkiat.com/blog/creative-common-music-download/

Hope this helps anyone wanting to contribute by bringing to attention any music/sound/loop that can be used in this project.
Be sure to check the specific,individual, license of any music/sound/loop you may think of.

i like music from super tux kart and this game. free sounds will be useful

Also, Newgrounds has an Audio section where people can put their songs. The songs are (as far as i know) all available under a Creative Commons license.