SPC

The Blue Bomber's Multimedia
Various files for the Super Nintendo.
http://windblade.50megs.com/index.html

Skytopia
Hundreds of individual SNES tunes examined and classed, with mini-reviews and trivia of the best. Music judged according to rhythm, melody, intricacy and general orchestration.
http://www.skytopia.com/games/snesmusic.html

Voidaudio.net
Over 11000 SPCs and other audio formats.
http://www.voidaudio.net/

Zophar's Domain: SPC Archive
Over 18,000 Super Nintendo files.
http://www.zophar.net/zsnes/spc/