Rhino

For you people who are using Mac computers. Rhino is under development for Mac and

until then there is a free demo available for download. It seems ok. I wanted to learn 

Rhino rather than continuing with sketchup mostly because I find the constant spinning 

around in sketchup very tiring for the eyes. It seems a bit more complicated but it also

seem to have many similarfeatures to AutoCad so it might not be impossible to learn.