GB.Net - I should have more time to work on this now that I'm back at school. See I can't compile programs on the school computers because the dumb fuck admins won't install .Net 2.0 or MDX, cause "I'll use them to play games". Like that isn't already a problem, all the kids do is chat on MSN(yet IRC is blocked, fuckers), watch Google Video or play Counter Strike, INCLUDING THE ADMINS! Anyway the point is that it's the perfect environment for just punching in opcodes.
This is supposed to import .an8 3D models and allow the user to view them / save them to .x. However right now there is no "viewer" part, only a command line utility to do conversions. Plus it falls apart on complex meshes, but it's not like I'd be using those anyway on my fancy 64MB built-in card!
I just started this one on Sunday so I'm still experimenting with how to actually process the heightmap data.
I have some others, but don't know if I'll continue with them, plus the screenshots aren't impressive at all.