What is Sketchup (and How Do I Use It)?

Sketchup (formerly Google Sketchup) is 3D modeling software that’s easy to use and has an extensive database of user-created models available for download. You can use it to sketch (or import) models to assist with all kinds of projects—furniture building, video game creation, 3D printing, interior design, and whatever else you can think of.
by Brady Gavin via How-To Geek