What mods and server softward does Unemployed SMP use?

I'm genuinely very curious, their gameplay is so beautiful and smooth, I'd like to use it to my own server too! What are these kind of mods called by the way? That way I could search more up.

Thanks in advance!

Unemployed SMP S2 Trailer: https://youtu.be/TUPsOc22mYw?si=FlV7olh3OrXcMti0

And oh I mean every mod in there.