The sort of program that once set up, just ticks along without fuss or bother forever.
For me, as I’m replacing the vms today which I set up five years ago and haven’t needed to touch since;
- HAProxy
- KeepaliveD
Not easy to learn, but once they’re running, they both go on forever.
So many. So many little utilities that just work. To mention a couple I think no one will mention because they are not sexy: Okular and Ark
Big fan of the KDE suite of software. I’ve tried alternatives, but always come back to plasma and associated software
Okular works so well at this point that I use it to annotate all my PDFs if I don’t explicitly need free-hand drawing (and xournalpp otherwise).