MIUI (pronounced as mee-yoo-ai) is a custom user interface mod developed by Chinese private company Xiaomi Tech.
Due to the clean interface, various custom apps, new functions and huge custom themes support, it has gained popularity on custom rom users and developers.
Traditionally MIUI didn't support App Drawer so all of the widgets and apps were placed on, what we call, 'Home Screens' only.
It was the major drawback for those who wanted to have separated Home Screens and App Drawer.
But due to the recent development it can be solved by installing MIUI App Drawer (link below).
This rom is very slick, neat and efficient. I highly recommend you to download and try.
MIUI Rom for LG Spirit (Game Theory published rom)
MIUI Official Page (English)
App Drawer for MIUI