lol - yeah, that needs to be advertised more as a feature.
As a font splitter, I don't mind making it a community project, but I don't think it really needs to be - if the cropping feature in the image manipulator gets fixed, cropping's a cinch. All I need to do is run a loop through the image to check for the letter same way I'm checking via collisions (except checking each pixel for alpha) then crop.
As for the other features, essentially making it a general-purpose sprite sheet splitter if I understand what you're aiming for, I'm afraid I really am too busy to put that much work into it. This was meant to be a font splitter, not a sprite sheet splitter. I made this one because the design is simple and based off of things I'd done in the past, so I was confident I could whip it up quickly. If I could think of some quick way to do it, I would consider it, but I can't atm. If anyone else wants to make a sprite sheet splitter out of this though, they can. It's not like I'm patenting the technique.