Royalty-free Music Sites

Audiosocket   https://www.audiosocket.com/
CC Mixter   http://ccmixter.org/
Chicago Music Library   https://www.chicagomusiclibrary.com/
Free Music Archive   http://freemusicarchive.org/
Internet Archive Audio Archive   https://archive.org/details/audio
Jamendo   http://www.jamendo.com/en/
Open Music Archive   http://www.openmusicarchive.org/
Opsound   http://opsound.org/
Petrucci Music Library   http://imslp.org/wiki/Main_Page
Public Domain 4U   http://publicdomain4u.com/
Stock Music   http://www.stockmusic.net/index.cfm
The Music Bed   http://themusicbed.com