XenonHD is a custom firmware aka ROM for various Android devices. It is built from Android Open Source Project (AOSP) with additional features, performance and battery life improvements.
The idea behind XenonHD is to give users a ROM that is "blazing fast, rock stable and buttery smooth".
Base : KitKat 4.4.2 : FULL AOSP BASE FROM SOURCE.
It's Rockstable,Blazing fast.
and now Buttery Smooth too!
Download in post #2
Changelog in post #3
Screen shots in post #4