Nice Mesh Viewer! Do you wanna release it?
What are you talking about?
Could you say something about your plans
I don't know

Really

About umodel (possible plans, it may be never done):
- implement support for Rune and Lineage2 models
- implement StaticMesh support
- implement support for UShader and UCombiner (complex material objects) - at least to support envmapped textures
- look at UT3 and Gears of War package format (it seems, skeletal mesh support for UE3 is impossible - their meshes are multipart, and joined together from script

but mesh and animation format more or less documented in script sources)
Also I have my own Quake2 version (quake, ported to my own engine). It can load Quake1/Quake2/Quake3/Kingpin/HalfLife1 maps, Quake2/Quake3 player models - and this is without game.dll modifications ... I wanna integrate my skeletal animation system into it and implement support for player models from UT2003/UT2004.
And I want to release some other my projects.
how long would you need to code the features we have spoken about?
I've just uploaded umodel version with VertMesh export function (win32 version only, I cannot compile it for Linux now). Test it

If everything will be ok, I will make anounce at my site.