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.)}~