I am really interested in what Tools others are using for modding.
I use those (All open Source or at least free to use):
- Tortoise SVN
http://tortoisesvn.net/index.de.html for version control, merging, etc...
- Notepad++
http://notepad-plus-plus.org/ For searching through files and minor editing
- Blender
http://www.blender.org/ Well, for 3d modeling...
- Paint.Net
http://www.getpaint.net/ Textureing, there are a lot of plugins available!
- Eclipse
https://projects.eclipse.org/ with LUA Plugin. Perhaps someone creates a Plugin for xsp in the future
- Python
https://www.python.org/downloads/ for speeding up common processes with scripts
*Edit*
- BVH Hacker
http://www.bvhacker.com/- bvh libraries e.g.
http://mocap.cs.cmu.edu/- MakeHuman
http://www.makehuman.org/- FreeCAD
http://www.freecadweb.org/ sometimes useful for creating base mesh for static, technical or furniture models