Shazam - Shazam is a mobile app that recognizes music and TV around you.
Epidemic Sound - Website with licensed music to use in youtube videos
SoundHound - SoundHound - the most immersive music search, discovery and play experience on mobile.
Extreme Music - Production music licensing
Musixmatch - - World’s Largest Lyrics catalog and official
Premiumbeat - Premiumbeat.com provides high quality Royalty Free Music.