LXQT does its job for me these days. It's not the most polished but at least it doesn't go out of its way to make my desktop look and act like a tablet so I'm happy with it.
I've been toying with writing a Wayland compositor that does wmii-like tiling, but can also do proper floating window management, but I have to wait for things to settle on the Wayland front before writing anything that's useful...
Edit: whoever downvoted you clearly never had a few hours of fun on a Friday night tweaking FVWM only to find out it's 4 AM now and oh crap it's also Monday!
I'm still sorry about my FVWM config. It was almost perfect. I should search for it in backups.
Nowadays I'm just using gnome with pretty much default configs.
I still in theory maintain one of mine (wmx), and this thread just prompted me to go and fix a few warnings that newer compilers come up with. Egads, there's some grubby code in there.
Writing your own web framework?
A long, long time ago -- but still quite some time after it stopped being (too) regularly maintained -- I emailed Matt Chapman to ask him to include my WM in the list. He never answered, thank God, that was my first piece of non-trivial X11 code and it was absolutely gruesome, I don't know what the hell I was thinking.