This is Seafile for me. Definitely not the “set it and forget it” Google Drive alternative I was hoping for. Thank goodness I have Syncthing backing up important files, but sharing with friends and family is a nuisance.

I hadn’t heard of Anki. For others who are curious:

A semi-official port of the open source Anki spaced repetition flashcard system to Android. Memorize anything with AnkiDroid!