ChordU - Extracts chords from any song, integrated YouTube.
Loopz – Best Drum Loops! - Loopz – Best Drum Loops!
Chordify - Chordify turns any music or song (YouTube, Deezer, SoundCloud, MP3) into chords.
Drum Loops for Guitar - Drum Loops for Guitar is one of the reliable applications to design highly accurate BPM tunes used and tested by many professional musicians.
Riffstation - The web version is Free and you can learn how to play Chords with Youtube Songs.
Drum Loop Maker - Drum Loop Maker provides an opportunity to tune your musical instrument in a proper sequence.