Get accurate face properties: Centroid, Area, Moment of Inertia and Radius of Gyration
This tool lets you use plugins/extensions without installing them (good for computer labs or keeping SketchUp lean).
A toolbar for placing basic shapes (primitives)
Keep an eye on SketchUp news and tutorials from blogs, forums, and tweets right inside SketchUp
Upload your SketchUp models to the 3D (WebGL) viewing, rendering, and sharing website Sketchfab
Unwraps shapes and lays arbitrarily oriented faces flat on the ground.