I am looking to develop an in-browser game in Unity3D, but I would like to write my builder tools for my project on a more powerful platform.
The assets I am building for the game are not traditional 3D models, so I'll probably be creating my own format. I was thinking about writing something in Blender or Maya, but that is a lot of overhead for what I want to do.
A Unity3D desktop app was also a possibility, but at the end of the day I decided I wanted to build it outside of the game engine.
Since the Unity3D app is going to be cross platform, I would like the tool to be as well.
Saying that, does anyone know of a 3D library/platform that will run well on Windows and OS X?