ExplorerPatcher makes it easy to configure in the settings menu, I'm not aware of any other projects that implement SWS: https://github.com/valinet/ExplorerPatcher
It's very fast and can be configured to set window thumbnail size/area
SimpleWindowSwitcher looks like a good alternative, unfortunately on my side I think I would prefer switching between all windows of all apps rather than have two different shortcuts for "switch between windows of the current app" and "switch between apps" (but that's just a personal preference).
ExplorerPatcher looks cool too, though patching explorer is probably a no-no in corporate setups.
I also saw https://github.com/kvakulo/Switcheroo which I was curious to try (although it's not an exact replacement either) but never got to it (also seems quite old).
First beta release at
https://github.com/coezbek/switcheroo
Noteable: column design for most frequently used applications and pinned apps shown separately.