TreeSize has saved me a lot of bytes over the years. Performant and visually slick. I would prefer a FOSS utility, though. Apparently, reading other comments here, there isn't an actively maintained one that isn't garbage. Oh well.

Procmon has gotten me out of a couple binds. Task Manager can only do so much for you. I've always been dubious of people who deify Task Manager as some ultimate authority of the OS that kicks ass and takes no prisoners, as I've run into several problems it couldn't solve for me. Procmon feels like the real version of that mythic Task Manager. The main thing it can do which Task Manager (to my knowledge) cannot do that I've needed several times is detect which running processes have a lock on a given file, so I can kill them.

KeePassXC is KeePass2, but not sinfully ugly. It's FOSS and equally functional as the program it aims to supplant, but it's also multiplatform (so I can use it on Linux without Mono!) and it looks like it actually has a design philosophy developed by someone who knows a thing or two about UX design. Also, it lets you auto bulk download favicons for all of your key entries. With KeePass2 I had to do that manually one by one. I was happy to do it then thinking the program was worth it, but now that I know there's a better way I feel like an idiot for putting up with it for as long as I did.

Also, just a short rant: I am so glad Windows finally has a native OpenSSH implementation that ships with the OS. Because that means good fucking riddance to PuTTY and WinSPC. I appreciate them having been there to be our secure and stable options for SSH and FTP/SFTP clients on Windows over the years. But now that I can finally do those things in the terminal with standard cross-platform tools, I no longer have to use their ugly, clumsy GUIs, their stupid .ppk key format, or WinSCP's cryptic command line args ever again, and I couldn't be happier.