I make 8-bit music (composed primarily on an old-school gameboy using a nanoloop cartridge) and release all my work for free under the Creative Commons ShareAlike-Attribution license, which means your free to use it if you provide credit.
I make a lot of music myself, but there is a good source for RPG/Horror music called Presence of Music, that I've seen used in RPG Maker games like Finding Eden. Has great sample quality, a lot of awesome, etc. etc.
I should be putting up a topic showcasing my own music at some point in the near future. If you have the time, please check it out and critique!