Robotic Guitarist is a virtual guitar for your Android device.
Its chord guide has an easy-to-use interface that allows you to change chords as you play. Choose a chord without having to learn finger positions and just hit the strings to get sounds recorded from real instruments. Robotic Guitarist will show you a diagram with finger positions for any chord you need to play. Nice if you're practicing to play for real. Robotic Guitarist is also your loyal electronic pocket-tuner and metronome.
You can strum chords or play arpeggio style by choosing one of the two picking modes.
Soundwise, you can choose between acoustic or electric guitar, piano (two octaves available), chorus or flute and map them to the whole guitar, or even pick a different one for each string!
Robotic Guitarist allows for plenty experimentation and is lots of fun to play around with. There's a full functional free version and an ad-free paid version available from Android Market.