Pi Case version 1by
Originally designed for raspberry pi 4, it can also probably work with other Pi models as well. It doesn't have any mounting hardware, but I usually have a hot glue gun, so...
I'd like to see someone remix it with proper spaces for mounting, or maybe make a front panel for it.
It is a very roomy case for the Pi (it can hold like 4 40mm fans!) so you can put a beefy cooler or something in it. I'd like to see someone pimp it out with RGB!