The better-known normalize.css is https://github.com/necolas/normalize.css. It was last touched seven years ago.
There’s a reason neither has seen more recent activity: they were mostly about making old browsers behave themselves, and they’re done. The stylesheets did have a little more to them, but it wasn’t what people actually cared about… and in some cases they were better off without them. I know I disagree with quite a few of their opinionated styles.
Those old browsers are now long obsolete—half of them can’t even talk TLS 1.2, which basically excludes them from the modern web—so almost all of these stylesheets is obsolete, and you don’t need them.
For the few pieces that might still have value, you would now prefer to use @layer or :where() for this kind of stylesheet, to make them behave more like user agent styles and avoid specificity conflicts.