Some good, although simple, models here. Some of them, like the steps afaik, make doom 3 editor crash, but the vehicles are okay. No normal maps, which would be nice, but I'm not complaining. Obviously a lot of good information here too, about terrain creating, modeling, using blender. MD5 exporting and other stuff.
http://www.katsbits.com/download/models/ (http://www.katsbits.com/download/models/)