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.
Discord. As a chat platform, it is by far the most user-friendly one out there despite its proprietary nature and lack of respect for privacy.
Messaging platforms are so hard to replace since there’s a social traction aspect. I can pick out the most secure and private messaging service, and then have no one to message on it