Does Roguelike equal RPG? In that case you might like
IVAN.
Then there's our list of
complete open source games. Check out the 'role playing' section.
There's also
Ardentryst, which is a 2D-side scroller action-RPG, which I haven't checked out in a long while (because I can not remember that name at all). Last time I tried it there were about 15 stages and two different characters, so definitely worth a try.
Are you looking to play or contribute?
I haven't tested
Hale yet. Might be a tactical battle rpg worth playing.