Sites with Royalty-Free Audio

Incompetech.com: Kevin MacLeod's site, with original musical compositions available for use free of charge but with attribution.

YouTube Audio Library: A library of more than 150,000 musical selections available from YouTube. 

Free Music Archive: a blog about music and lots of free selections for download. 

Free Music Archive (French): French music for free download. 

French Songs & Poems: More French songs available for free download as .mp3s.