I know there are loads of engines currently available out there, that have loads of tools being created for them. What I want to do, is basically try my hand at them and determine which are the most effective. Refactor them for the engine I am currently using, and release them. I am looking for: 1. Shader Editor 2. Particle Editor 3. World / Terrain Editor 4. Animation Editor 5. Sound Editor So what does everyone recommend?

3D (Animation) Editors (These are free, but only Blender is open source).

Anim8or
Blender

Shader Editor (Not Open Source)

Hyperion

EDIT: Never mind :).