I'm planing to use JEDI-SDL for a 3D beat 'em up game. For characters I think the Cal3D library is the way to go, it needs some updating, but it shouldn't be too hard to do. As for the levels, I need some recommendations, are there any good and simple open formats, where I could easily include some entities (enemies positions, items, etc.)? Of course I can always save my levels as .x or .3ds and add entities through some text files, but it would be harder for some people to build levels. I'll be gratefull for any information.