FreshRSS: RSS reader (TinyTTS is also decent, but the developer is kind of a richard)
Kanboard: For keeping track of all my client projects (though you can use it for any sort of project tracking)
Nextcloud: It's pretty full featured, but I only really use it for shared calendars and contacts so that I'm not hosting on Microsoft or Google.
The closest thing I ever used that backed up actual hardware was a Playstation 1 card reader. At the time I was backing up game saves and porting them to the ps2 for emulation or something i forget exactly.
It was wild to do something like that on your computer back then. A Sony memory card in your PC? Bonkers.