dwmwins hands down for me. I don’t need any fancy/shiny/pretty stuff. I just want something that will manage the windows of any applications I open and that will stay completely out of my way, so I can just get on and do things.
I’ve installed it from source via suckless.org’s official dwm GitHub. So updating is pretty trivial. And it only takes a couple of seconds to rebuild.
Modding it is relatively trivial too, as long as you have a bit of experience with C. Which I have plenty of! Ha ha!
And then there’s its concept of "tags", which is similar to virtual desktops, but not quite! It’s a bit more nuanced. And something that all other dwm-like tiling WMs have adopted.
And dwm uses almost nothing in terms of memory/resources.