https://www.luanti.org/ is a near perfect minecraft clone, better actually in some ways. Setting up a server for example is cake when you don't have to worry about DRM or authentication whatsoever. Every instance is a server with a click of a button. If the server is running mods your client will automatically download them proper mods to match.

The only thing it's missing is the huge library of mods minecraft has, but It's easier to make mods for Luanti than minecraft since it's open source.

It's more than just a mincraft clone, they're angling to be the open source minecraft + roblox all rolled into one. It's already better as a base game than either.