http://ccmixter.org/
ccMixter is a community music site featuring remixes licensed under Creative Commons where you can listen to, sample, mash-up, or interact with music in whatever way you want.
Remixers If you’re into sampling, remixing and mash-ups grab the sample packs and a cappellas for download and you can upload your version back [...]
http://www.freesound.org/
The Freesound Project is a collaborative database of Creative Commons licensed sounds. Freesound focusses only on sound, not songs. This is what sets freesound apart from other splendid libraries like ccMixter. New to this site? Read the What is Freesound page to learn more!
http://etc.usf.edu/lit2go/
Lit2Go is a free online collection of stories and poems in Mp3 (audiobook) format. You can:
Download the files to your Mp3 player and listen on the go,
Listen to the Mp3 files on your computer,
View the text on a webpage and read along as you listen,
Print out the stories and poems to make your own book.
There [...]
Free Play Music is a great site for school multi-media projects. You can browse music categorys with over 2500 tracks of music