So, there are projects like these;
https://github.com/ihhub/fheroes2
Projects that in one way or another aim to modernize a classic, or try make it more playable on modern machine, or just try to expand on things (like gzdoom does)
what other projects are out there in a similar vein?
I find this a little difficult to search for, even with specific terms (i tried finding myself)
There's OpenGOAL which makes the Jak and Daxter games run on modern PCs natively. AFAIK only the first game works flawlessly so far. They're such great games, I'm glad someone is going for it.
Someone also ported Mario64 to PC a while ago. You need to jump through some hoops to get it yourself, or sail the high seas to find an exe file that's already compiled.
oh, interesting, ill check em out