Each their own, that's mine. Note that this is not a tech user or developper list, but the list of what I install on any new windows pc, including those at work etc ...
7zip (open any archive)
VLC (open any audio/video file)
IrfanView (+ the "all plugins" installer on the same page, open any picture file)
SumatraPDF (read PDFs)
Libreoffice (to open any office files)
NAPS2 (easy scan, and split/merge/... PDFs)
Ditto (give your clipboard a memory)
Everything (an instant file search that works)
TeraCopy (replace windows copy with queue, queues, add files to the queue instead of starting a second parallel copy, pause that works, ...)
Powertoys (so many to list ... mass rename file easily, screen ruler, text extractor ...)
If it's appropriate : Qbittorent (clean torrent client)
Nvidia graphic card ? NVCleaninstall, so you can install just the clean driver you need
Windows 10 or 11 ? O&O Shut Up (to disable all the telemetry and onedrive in one click, there are plenty alternatives but I sort of like this one)
Windows 11 ? ExplorerPatcher to remove suggestions in the start menu and the new and terrible castrated contextual menu
And of course your browser of choice and extensions
In ten minutes you have a computer that feels much more smart and usable. There are plenty of great software out there, but I feel like many what to install lists are very topical or include software you won't use in many cases or once every 6 months, so this is my short list of what you will use essentially every time you use the computer.
I recently started having trouble with 7zip at work due to shared sharepoint folders and the like. I wound up finding ZanaZip which was forked from 7zip but keeps up with modern OS changes.
Thanks for sharing your list; I already use many of them but learnt about a few new ones that I'll try. I second Everything, the best, nifty little, Windows search utility that is blazing fast.
Not using windows much anymore, but great to hear about O&O and ExplorerPatcher. I notice you don't list an ssh client. I still install cygwin for that. Anything new besides putty?
SSH client is not for non tech users and I tried to keep my list non tech oriented, something you can install on yours, your mom or Janice from accounting and they will all benefit from it.
For SSH I was a die hard team PuTTy for a long time but these days one of the first thing I install on my windows computer is WSL and a Debian inside, that covers all my SSH needs.
Windows now have OpenSSH client (and server) available as optional features. Together with the new terminal the ssh client seems to be working fine. Personally I usually opt in to use the ssh in WSL as I keep it installed on all my Windows machines.
The reason I started with TeraCopy was that it could to automatic verify after a move but before deleting the originals. Had lots of problems with corrupt transfers and wanted to be certain.
Now it's just what I use, I know it works and my files are safe.
This is my list, but it’s pretty opinionated and is missing some pieces: Backblaze Backupper, Canon CaptureOnTouch, YNAB CLassic, and GPSoft’s Directory Opus