I like Shockwave-Sound.com. I've bought a number of tracks from them. As I run a non-profit organization, I need to find very low-cost stuff. Check it out!

http://www.shockwave-sound.com/
Permalink | Report

Podsafeaudio.com is the perfect site for you

edit: filmkid has a great answer to the question
Permalink | Report

Look for content created and protected under a Creative Commons license or CC. There are different stipulations on each kind of content but some content created under a CC license can be used for commercial projects as long as the attributions of the original license are included when distributing the new content.

In the column on the right under Featured Audio Sites browse through some of the sites to locate archives of music fitting the requirements you have explained.

http://creativecommons.org/audio

Avoid content that has the No Commercial attribution. This is represented by a dollar symbol inside of a crossed out circle.

Try searching the CC Database for music.

http://search.creativecommons.org/
http://creativecommons.org/license/music
Source(s):
Personal Experience with creating content and working with others in the free music industry.

http://creativecommons.org/audio
http://search.creativecommons.org/
http://creativecommons.org/license/music

Permalink | Report

check out this blog
http://www.audiomicro.com/royalty-free-music-blog/
Permalink | Report