Play the Guitar? Got a mobile phone?

then you need the Yamaha Musician's Companion as written about here. It's an essential tool which includes a chord reference with over 1100 chord fingerings and even plays each note. There's also a metronome to keep the beat whether your instrument is the recorder or the double bass. There's a beat finder enabling users to determine the tempo of a song and a pitch pipe to allow you to tune your instrument to reference a standard pitch.

You can read more about the software here and also buy it at http://www.yamaha-wireless.com. The site is viewable from your PC or your mobile phone.

All this for USD 9.99. Sounds like a bargain to me.