The DGuitar project is looking for Java programmers to help out with their roadmap towards the next release.
Mauricio Gracia Gutiérrez of the project says:
My intention with DGUITAR is to include GP5 and other file formats (the whole CODEC concepts) and display MUSIC NOTATION (not just tablature) and allow EDIT/CREATION of files
Also the posibility to have a DGuitarMusicPlayer for your GUITAR FILES that allows you to ENJOY an ORGANIZE your music colection without having to open the full program an play them one by one.
Other ideas are to include a WEB version that works on mobile devices, such as Android/IOS and does not even need to be downloaded or installed.