If you’re – like me – is a huge fan of old C64 (SID) music, then direct your browser over to the Stone Oakvalley's Authentic SID Collection (SOASC=) and browse / download just about any tune ever released for the C64 in MP3 format:
http://fonix.dyndns.org:40000/soasc/
..and ohh – I you’re into Amiga music – check out this link:
http://www.paula8364.com/