For me, Google video search, Google books (Internet Archive is good, but doesn’t always have the same stuff), Adobe InDesign (but in the process of learning LaTeX), and Typewise. As for the Google stuff, I liked Whoogle a lot, but almost all their instances seem to have been blocked or shut down. Also, apologies if this is repeating an earlier post.
Man, I tried to learn FreeCAD, but coming from the Inventor/Solidworks paradigm it was hard.
I used to use Solidworks and NX some. I think there are similarities. That is sketch based. I admit though, not really learned FreeCAD either. On my list some day.
There is also ondsel, which is basically freecad with some polish maybe. It looks the same to me. But one day when they solve the topology renaming thing and when they have an interface that’s not openly hostile I’d love to try it