What are some alternatives?
When comparing WhoSampled and WatZatSong, you can also consider the following products
Shazam - Shazam is a mobile app that recognizes music and TV around you.
SoundHound - SoundHound - the most immersive music search, discovery and play experience on mobile.
MusicID - Hold MusicID up to music and it'll tell you the name of the song in seconds.
Musixmatch - - World’s Largest Lyrics catalog and official
Midomi - midomi.com find and discover music and people.
TuneFind - Tunefind contains an index of music and songs appearing in popular television shows and movies. Find a song, or see where an artists music has been featured.