Back in the day I used to use PowerToys, then it seemed to get abandoned with the release of Win 10.
Lo and behold!
Today I discover it has been updated and works with Win 10 and Win 11.
Too many tweaks to the OS to list, but my current favourite is the ability to move a window by left-clicking+ALT, anywhere in the window and dragging - not just the toolbar.
Right-click and ALT enables window resizing without grabbing an edge.
Love it - been using it for years, since some point on Win 10.
I use the keyboard manger to change the co-pilot key to Win (Right), Caps Lock into Enter and add F keys replacing print screen etc, and my other big fave is Fancy Zones
Fancy Zones does look interesting.
There’s a whole heap of tweaks there.
I’m pleased to have found it again. (Entirely by accident. I clicked a bookmark in my browser and I got a 404 error, with a list of “Pages I might Like” - PowerToys was on of them.)
I like using fancy zones for child dialogue windows. I made a zone that’s the center of my screen and about 75% the size. So I hold shift on the file/open boxes and drag them in there and they center and nice and big.
I use the ‘Always On Top’ feature, with a hotkey. Very useful. The color picker, but rarely. And the File Locksmith. Sometimes you gotta know.
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But also Listary for piggybacking child dialogue boxes. It has other handy uses but that’s the one I keep it around for.
For example, let’s say I want to upload a pic to this forum. I click the ‘Upload’ button and up pops the windows file dialogue. But it always defaults to the last used folder. But I want to go to my ‘Forums’ folder, where the pic is. So see the Listary box, I pointed to it in this pic. Just start typing and there it is. Press enter and I’m at that location. Cherry 
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And Void Tools Everything for quick searches.
And Binary Fortress - Display Fusion for auto-resizing windows. Somewhat similar to powertoys - fancy zones. It has triggers: for example I make my windows notepad++ open to the right half of my screen every time, without me having to move it every time.