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.
I wanted to fully switch to Linux and FOSS for a while now but specialised software like CAD and image editing are either non existent or completely useless for professional purposes in their FOSS versions. What angers me most is that most is them could run on wine easily if the developers did some minor changes so it seems intentional.