sMiUI is a Custom-ROM-Project for Xiaomi-Devices that started in late 2014. It is based on the weekly Developer ROM, released by Xiaomi. Further we participate from the xioami.eu Team, which does a great job in adding European languages to the chinese ROM!
sMiUI packs lots of great features, fixes and performance-tunings on top!
Multilanguage -- CenterClock
init.d Support -- CRT-OFF
zipaligned -- Battery Tweaks
Performance Tweaks -- RAM Tweaks
Cleaner UI -- SuperSu Root
Removed Chinese Apps -- Faster GPS
3-Way Reboot Menu -- Volume Boost
Modded UI Animations -- AdBlocker
Unicode MMS -- SystemApp Selection
CPU/Thermal Tweaks -- And many more ...
sMiUi Developer Visit -> SMIUI Website