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.
Solidworks - A reliable FOSS 3D CAD package would be amazing… Parametric Blender? Photoshop/Illustrator - I know how to do 50% of what I need to in GIMP/Inkscape, but I lean on Adobe usually!