SUbD is a parametric subdivision extension for SketchUp optimized for quad-based workflows. Use free tools such as QuadFace Tools to create meshes with quad-topology and subdivide and crease with SUbD. Visit the website for more details, examples, videos and manual.
Come to the first-ever European 3D Basecamp will take place September 9th and 10th in London!
3D Basecamp UK will be a gathering for 150 SketchUp enthusiasts to meet, learn, showcase and be inspired by one another over two action packed days. It's also going to be the funnest event you ever attended. http://ow.ly/QtRNZ