Edit Tools: DX Studio

Freeware edition available. Price: $347 (Standard); $744 (Pro)

While it's possible to create interactive 3D graphics with standalone
software apps, integrated development environments speed creation by
pulling all of the useful toolsets together. DX Studio is one of the
few apps that offer such an all-in-one approach, including both a
realtime 3D engine and a suite of editing tools. Features include both
2D and 3D layout editors, as well as full JavaScript control of
everything — from changing the background to editing meshes in
realtime. New features include PhysX support (select either Bullet or
PhysX physics for projects), improved user controls (you can now create
your own 2D controls), and key-framing of script variables.

www.dxstudio.com