As the name and the lovely mascot suggests this software was probably intended to be a free open-source GuitarPro alternative for Linux but the software is written in Java which means it basically works on any platform including Windows.

TuxGuitar is awesome! Functionally it is almost like GuitarPro but better in the aspect that you won't have to spend a dollar on it (unless your big of heart and would like to donate to the angels named the programmers of this software). And the best thing also is that it reads gp3, gp4, and gp5 files so you don't have to worry about some obscure file types.

So if you like to play the guitar and want to learn some new songs efficiently and if GuitarPro is too expensive for you I recommend you to download TuxGuitar. You won't regret it. I haven't. Can't wait to get to college and buy a guitar XD.