AudioTag - AudioTag.info — is a free music-recognition service.
Musixmatch - - World’s Largest Lyrics catalog and official
ACRCloud - Automatic Content Recognition (ACR) cloud services for Audio Recognition ( identify music, ads ), Broadcast Monitoring, Second Screen, Copyright Protection.
Genius - Genius is the world’s biggest collection of song lyrics and musical knowledge.
Gracenote Music Recognition - Gracenote Music Recognition is best in class music recognition platform that uses audio fingerprinting technology for identifying any music.
Lyrics Training - A game where you fill in the lyrics of your favorite songs