TuxGuitar is a multitrack guitar tablature editor and player written in Java-SWT, It can open GuitarPro, PowerTab and TablEdit files.
Greate guitar tab editor and player!
Excellent, only really useful thing missing is an option to to apply parameters such as loudness to groups of notes / entire bars as well as individual notes.
Pro: Super easy to pick up and use. Surprisingly powerful. Cons: Some non-functional features. The TAB entry method felt very comfortable for me (a new user of such software) to pick up. The player is about as good as most MIDI players, which is to say its not going to fool most listeners that it is such, but its more than passable to deliver ideas and preview your work. Editing note dynamics (forte, mezzoforte, etc) is a pain due to lack of ability to edit more than one note. Biggest gripe is that the export features don't work well: the musicXML files it exports may generate errors in other notation software which explains the files aren't valid musicXML files. They import incorrectly when this happens as well. The same or similar results may occur with MIDI files exported using Tuxguitar.