SKP
From Just Solve the File Format Problem
				
								
				
				
																
				
				
								
				SKP is a file format used by SketchUp (once owned by Google after they acquired its original developing company, @Last Software, but later sold to a different company, Trimble) for 3D models. It is proprietary and does not appear to have been documented in any publicly accessible place.
Sample files
Links
- SketchUp site
 - Wikipedia article
 - Discussion over whether format documentation can be found
 - SketchUp: Importing and exporting CAD files
 - SketchUp in digital archives. Software and file format analysis and exploration of the options for digital preservation - Report by Henk Vanstappen, commissioned by The Flanders Architecture Institute