SoundGrail is a free music theory app for pianists, guitarists and DJs. Learn chords, scales, key signatures, and more. Play guitar, piano and DJ like a pro!.
Awesome Guitar is designed to make a virtual guitar feel like a real guitar. You can play many of guitar technique like bending, slide, vibrato, tapping, whammy bar, harmonic, palm mute easily.
Uberchord is the first interactive guitar trainer that can hear exactly what chord you are playing. Learn how to play chords with your real guitar having Uberchord listen to you through the built-in microphone of your iPhone.