Polysmith is a JavaScript based 3D modeling software that uses three.js along with CSG and BVH in the background. It can export STL and OBJ files to be used for 3D printing. In the future we would also like to be able to slice meshes directly in three.js and stream/export the resulting G-codes, see the Polyslice project for more info.
I'd love to see all the things you create with Polysmith so please connect and share! I have used this software for all of my personal 3D models, you can view and download my creations on several different websites listed here: