AppCleaner
1Password (but may be looking for a new PW manager as they are pushing subscriptions)
Firefox, then Chrome
ChronoSync (or other backup utility)
MoneyDance for checkbook register and financial tracking
Unarchiver
Pacifist (opens ZIP files and other compressed files, not just extracts...)
There are others. Being a developer type, I use MAMP Pro, Sequel Pro, etc.
If you use USB drives, I highly recommend Jettison. It will try and eject USB drives before shutting down or going to sleep. Has saved my bacon a time or two.