The software by google is very intuitive.
17.02.2013 – SketchUp is ideal to easily create 3D models. A free version is therefore available.
The software was sold to the american company Trimble Navigation Ltd by Google.
(c) Picture & Link: Tremble SketchUp
Update 03.07.2013 – Aldan Chopra gives insight into Sketchup at the Maker Faire Bay Area 2013
The Author of Sketchup for Dummies gives a course for Sketchup at the Maker Faire Bay Area:
Update: 02.04.2014 – Sketchup 2014 with new features and enhancements
The latest version launched in 2014 offers a variety of new models in the enhanced “3D warehouse”, a preview embedding function for websites, better documentation and additional improvements for modelling.
(c) Picture & Link: SketchUp