Hundreds of thousands of professionals in (take a deep breath) architecture construction engineering commercial interiors light construction landscape architecture kitchen & bath design urban planning game design film & stage woodworking and plenty of other fields use SketchUp Pro all the time every day. Its the all-purpose antidote to complicated expensive CAD software.
A smarter way to think about 3D modeling
SketchUp Pro is like a pencil with superpowers. Start by drawing lines and shapes. Push and pull surfaces to turn them into 3D forms. Stretch copy rotate and paint to make anything you like. More advanced? Start modeling from CAD and terrain data photographs or even hand sketches. Build models with custom behaviors and attributes. SketchUp Pro is as simple and as powerful as you want it to be.
Home Page: _http://www.sketchup.com/