Is there something like launchers for windows?

The one thing I like most about Android is the immense customizability using launchers. You have a completely new UI, any style you want.

Now, for windows, there's stuff like Rainmeter, sure, but that only enhances the "Launcher". Making a Launcher out of it is extremely time-consuming and resource intensive (especially when using sound visualizers, for some reason), and it's not even an ideal solution then.

So my question is, are there real "Launchers" for Windows?

(This post might not be entirely fitting in this community, but I didn't know where else to post it. Please let me know in case I should take it down.)