Guitars On Fire is a Guitar Hero clone, like Guitarfun and FretsOnFire. It uses Frets On Fire compatible songs, which can be found all over the internet.

Everything is released under GPL, which means the code is open for everyone to view and modify if they wish. It borrows graphics from both Guitarfun and FretsOnFire, and contains some new graphics. It does NOT use any of the FretsOnFire code, and only a little bit of the Guitarfun code. So it’s a different game with a different feeling to it.

Changelog:

New Features:
Practice mode
Versus mode
Last man standing mode
50/100/150/200 streak effect
GuitarHero World Tour Drums support
Experimental USB support (No idea if it works, enable it in the settings menu)
Saving settings
Saving of top scores and showing which songs you have compleeted already in the song list.

Bugfixes/changes:
Song selection redone (now returns to where you last where)
Default neck is now gray
Custom stages can supply a own neck/effect texture and note 3D models.
Ajusted the hammeron note generation, makes less hammerons
Fixed crash bug related to audio. Also fixed a few causes where the audio would get out of sync.
Make sure there is a bit of time after the game start before the first song.
Many tiny things I forgot.

http://www.wiibrew.org/wiki/GuitarsOnFire