Been awhile since I saw a thread like this and they’re always good for at least one or two things I’ve never heard of before. Bonus points if the software is open source and cross platform. Extra bonus points if you link to where we can see it/get it.
My contribution: Destiny which is an anonymous, P2P, E2EE file sharing app - its basically a GUI for a Magic Wormhole implementation. Works on Linux (tarball or appimage), Win, Mac, Android (inc f-droid) and iOS. Only downside is it’s not been updated for 2 years.
ClickBook - dunno if it’s even available anymore, but like 20 years ago it was either a standalone or add-on that formatted Word docs for printing. I think it cost $35. You could lay out say a tri-fold brochure or a folded-in-half and stapled booklet and it would rotate, combine and print the pages in the correct order. My wife and I used it endlessly to produce publications for our kids’ school. If your printer could only print on one side, there was a quick setup procedure that would would figure out how you should rotate or flip the stack of pages to do the second side. I haven’t used Word in years so for all I know it might have these capabilities natively now, but in its time ClickBook was probably the most worth-it program I ever bought.
Can you alter the header only on page 6? Or rotate pages 3 and 5? Because that’s the kind of wizardry that Microsoft refuses to implement in Word.