AudioTag - AudioTag.info — is a free music-recognition service.
OSD Lyrics - OSD Lyrics is a lyrics show compatible with various media players.
Shazam - Shazam is a mobile app that recognizes music and TV around you.
Lyrics Plugin - Lyrics Plugin is a piece of software tailored for music fans.
ACRCloud - Automatic Content Recognition (ACR) cloud services for Audio Recognition ( identify music, ads ), Broadcast Monitoring, Second Screen, Copyright Protection.
EvilLyrics - Automatic lyrics search tool for most modern media players.