AudioTag - AudioTag.info — is a free music-recognition service.
Bandlab - Capture, nurture, and collaborate on song ideas in the cloud
Shazam - Shazam is a mobile app that recognizes music and TV around you.
Kompoz - Kompoz is an online platform for crowd-sourcing music creation, making you record, create or publish music with the guidelines of a world-class musical expert.
ACRCloud - Automatic Content Recognition (ACR) cloud services for Audio Recognition ( identify music, ads ), Broadcast Monitoring, Second Screen, Copyright Protection.
Encore Music - An open source, extendable music player for Android.