SGS4 / i9505 resurrection remix, Android 5.1 Lollipop.
XDA: http://forum.resurrectionremix.com/index.php?topic=2037.msg7669#msg7669
Installation:
– Make sure you are either on any KitKat ROM (CM11, etc) or on 4.X.X STOCK based ROM
– Download the latest build
– Download Gapps
– Take a nandroid backup
– Recommended – Full wipe and factory reset
– Flash ROM using latest ClockworkMod or TWRP recovery
– Flash Gapps
– Reboot.
– Enjoy!