Artisan Plugin: Organic Toolset

If you're looking for new ways to sculpt 3D models beyond the standard push/pull commands, check out the Artisan Organic Toolset plugin.
It provides an assortment of ways to freely manipulate faces in your Sketchup models beyond the confines of the X,Y, and Z axis. YouTube user Sketchup Phan Thức has a great video showing off Artisan's capabilites (above).

Artisan Sketchup Plugin