98.css – design system for building faithful recreations of Windows 98 UIs

Are there similar retro-UI systems for other older interfaces? While I don't have that much nostalgia for Win98 myself, I could see how it could be cute to have similar systems for classic (System 6-7) Mac, Amiga, etc. I've seen websites that try to go for these looks, but I think they were manually done.

I've noticed there are a couple of these now so I threw a quick list up on Github: https://github.com/matt-auckland/retro-css

i found this too, (but i can’t find a demo page) https://github.com/npjg/new-dawn

That one was a bit disappointing - here's a screenshot: https://imgur.com/oFz7e0p

Funny enough, just yesterday (before seeing this post), I was searching for re-creations of the Macintosh interface.

Here's the best one I could find:

Apple Macintosh System 7 UI in CSS - https://github.com/pfcode/system7css (Screenshot: https://imgur.com/ZEKolbS)

Aah, that nostalgic comfort.. Makes me dream of building my next toy "OS in a browser" from this.

What would be nice is if there was something like a standard test or demo set of HTML for all these to work against, which would enable a way to switch themes.