Gushiku Studios has posted a Youtube tutorial on using RUBE with the RubeLoader for the cross-platform development frameworks libgdx. What is RUBE? It stands for "Really Useful Box2D Editor" and the name definitely fits! You can check out more information about RUBE on iforce2d's website. The RubeLoader repo on Github provides a loader that will read in .JSON data generated by RUBE for Box2D worlds using libgdx. Included in the repo is a self-contained example demoing the capabilities of the loader along with a sample rendering approach.