Trimble SketchUp Make 2013 (née Google Sketchup)
The MSI can be extracted using 7-Zip or by looking in your %temp% folder after launching the installer.
Website / Download: Windows, OS X
If you are a qualified instructor at an educational institution, or you are an enrolled student at an educational institution and use the Software in your classwork, you may use the Software for classroom teaching purposes, and classwork purposes. This includes installation and use of the Software in teaching labs at an educational institution, provided that use of the Software is by enrolled students who are engaged in classroom learning activities at the educational institution. However, if you are an employee of an educational institution and your job responsibilities are not those of a qualified instructor, you must purchase a SketchUp Pro license. For example, but not as a limitation, if you are employed as a member of the professional staff of an educational institution such as the facilities management team, you are considered to be engaged in for-profit activity and you must purchase a SketchUp Pro license.
Government agencies are considered to be commercial users and must purchase a SketchUp Pro license. (Source