AudioTag - AudioTag.info — is a free music-recognition service.
SoundGrail - SoundGrail Music App designed for pianists, guitarists, and DJs.
Shazam - Shazam is a mobile app that recognizes music and TV around you.
Figure - Propellerhead creates world-class software products and services that inspire music makers and provide the foundation for a worldwide creative musical community.
ACRCloud - Automatic Content Recognition (ACR) cloud services for Audio Recognition ( identify music, ads ), Broadcast Monitoring, Second Screen, Copyright Protection.
keezy - A colorful soundboard. Play with music.