TropicalGlen.com - This site has an online jukebox that can play the top songs from 1955-1964 as well as many others.
SongTapper.com: This site has you tap the beat of any song using your spacebar and then it tries to guess what song you tapped. It’s really very cool unless you have no rythem.
SoundDogs.com: This site has the best collection of online sound effects and music that I have seen and at the best prices. A great place if you need audio for a project.
Pandora.com: This site asks you what groups you like to listen to and then creates a personlized station that plays music that is likely to appeal to you.