SketchUp (formerly Google Sketchup) is a 3D modeling computer program
SketchUp debuted in August 2000 as a general-purpose 3D content creation tool, and was envisioned as a software program "that would allow design professionals to draw the way they want by emulating the feel and freedom of working with pen and paper in a simple and elegant interface, that would be fun to use and easy to learn, and that would be used by designers to play with their designs in a way that is not possible with traditional design software. It also has user friendly buttons to make it easier to use."
SketchUp is currently owned by Trimble Navigation, a mapping, surveying, and navigation equipment company. The program's authors describe it as easy to use. There is an online open source library of free model assemblies (e.g. windows, doors, automobiles), 3D Warehouse, to which users may contribute models.
The program includes drawing layout functionality, allows surface rendering in variable "styles", supports third-party "plug-in" programs hosted on a site called Extension Warehouse to provide other capabilities (e.g. near photo-realistic rendering), and enables placement of its models within Google Earth.