PhysicsEditor-Solar2D (formerly Corona SDK)
Tutorial - PhysicsEditor - Solar2D
The source code is based on the crates demo included in the Solar2D.
The graphics belong to CodeAndWeb - you must not use them in your own projects without written permission.
Read the complete tutorial at http://www.codeandweb.com/blog/2012/05/24/getting-started-with-coronasdk-and-physicseditor-tutorial