Color Engine to theme all your system apps and UI with just a touch.
Comes with Lawnchair, completely customizable Pixel Launcher.
An awesome UI, Venom, has the ability to customize everything.
It also has substratum engine support so you're not limited to Color Engine!
It has Pixel sounds!
It doesn't have LineageOS bloatware so you decide what you're going to use.
It is optimized as a whole, not fragmented. The most seamless experience you can get with a ROM.
How to install ViperOS to Xperia Z5:
Boot to TWRP.
Backup your current setup (System, Data, Boot, Cache)
Wipe > Advanced Wipe > Dalvik Cache + Cache + System + Data.
Install the ZIP file downloaded on your device.
Xperia Z5 LineageOS Team
ViperOS v3.1.1 for Xperia Z5 (sumire)
Previous build, just in case
ViperOS v3.1.1, ROM for the Sony Xperia Z5
Source Code: https://github.com/Viper-Project
ROM OS Version: 7.x Nougat
ROM Kernel: Linux 3.10.x
Based On: LineageOS
Current Stable Version: v3.1.1
Stable Release Date: 2018-02-25
Last Updated 2018-08-25