Until now, I hadn't used Sketchup, the 3D design software, since they were bought by Google. The last time I tried to use it, I didn't quite grok the "shaping" metaphors they use. But I recently needed to use some easy CAD software, and I after seeing some nice diagrams, decided to give Sketchup another shot.
Wow, once you let go of the polygon metaphor and start thinking in terms of sculpting shapes, Sketchup becomes much more intuitive. This simple drawing of a workbench for my garage took me only about 15 minutes or so to create.

I have a lot more to learn about using Sketchup, but I'm having fun using it so far. Hopefully, Google's investment will make this a more Windows-friendly app. And hey, how about a Linux version?