Projects for Old Versions of OS X
I really miss the colors and contrast of Snow Leopard. I was able to relatively okay with things up to High Sierra. Mojave brought random freezes on wake (~10s) on my Macbook Air 2015, Catalina brought call-home on every executable. Big Sur redesign just killed it. I don't like the unicorn coloring book for kids to be my OS! There's no contrast, there's just too much wasted space everywhere (I don't use external monitors). So all and all, I'm running ubuntu unity  ( https://ubuntuunity.org/ ) with Ambiance. Those have the right contrast for me. And I brought in Menlo and Lucida Grande fonts in for GUI and terminal. 
Those more round corners since Big Sur get on my nerves too :-( I'm sure I was using it wrong tho ... :-P