OrionOS is a project based on slim.
The name Orion was chosen as a representation of the beauty and vastness.
The Rom is built with Uber toolchain which delivers awesome smoothness and includes a custom kernel built from ground-up to ensure good performance.
How to Flash this rom
Download the latest build and Gapps and Firmware
Reboot to TWRP recovery
Flash the latest build and GApps and Firmware
10th October - 20th build [2.7]
6.0.1_r72, October patch
Sepolicy updates for sdcardfs
Fix VoLTE for some devices
Add cdma call forwarding
Speedup FP unlock
Update Substratum 
Current Stable Version: 2.7
Stable Release Date: 2016-10-12