Recently i stumbled over the Online CAD Onshape. I immediately fell in
love, because it is browser based (so it can easily be used on Macs and Linux) and it is free
for public models (and a small number of private models too).
It is a parametric CAD tool, so it is more in the Solidworks range than in the Rhino3D area.
After some testing, i decided to redraw some existing parts, to spot differences how i develop parts
with my Rhino3D package.
To summarize everything up: I love it, i will use it in the future and it gives me a perfect
Reason for buying a iMac Retina and a iPad Pro.
Here screenshots from the two models which you can also
access online. As a downside you
have to create a (free) account first, there is no way for i.e. embedding the model in my website
at the moment.