The lenovo K3 Note has turned out to be one of the most successful smartphone from Lenovo.
And due to its massive popularity, K3 Note is also famous among Android Development community.
There are many Custom ROMs for K3 Note. So if you have been looking for a Custom ROM for your Lenovo K3 note. Check out these.

Also Check these 45+ Best Xposed Modules for more Modifications.

Warning:-

Your warranty is now void.
I am not responsible for any Bricked devices. You are choosing to make these modifications, and if you point the finger at me for messing up your device, I will laugh at you.

Installation Procedure:-

You need Custom Recovery in your Device. Follow this guide to flash Custom Recovery.

How to Flash a ROM:-

• Goto Recovery
• Make a backup
• Wipe dalvick cache
• Wipe data/Factory reset
• Select the ZIP(Any Lenovo K3 Note ROM) and Install it.
• Reboot.

Top 5 Custom ROMs for Lenovo k3 note.

Resurrection Remix

Resurrection Remix is one of the best (may be best) Lenovo K3 note ROM.
Why? Here are the reasons
The ROM with most Customization Options.
RR is based on CyanogenMod, Slim ROM, Omni ROM and original Remix ROM Builds.
Most balanced ROM with maximum Performance and battery backup.

About ROM:-

Customize these:-

1.) Navigation bar
2.) Status bar
3.) Clock widget
4.) Lockscreen
5.) Notification Drawer
6.) Buttons
7.) Performance profile
And much more.

Credit:
Screenshots:-

CyanogenMod 12.1

CyabogenMod is a community built, aftermarket firmware distribution ROM.
CM 12.1 is based on Android 5.1.1. CM increase your Device Performance and also give you more control over the device.

Credit: CM team, kaka444
Size:
Android version:
ROM kernel: 
Screenshots

Pixel UI

Pixel UI is a clean interface K3 note ROM which is based on Android Nougat.

Androium 

Androium is a clean and smooth ROM, which is based on Android Marshmallow.
The interface is very clean and looks good.
This ROM is multi language and support a bunch of languages.(Italiano, Deutch, Polsikit etc.)

About ROM

Credit: 
Size:
Android version: 6.0 Marshmallow
Screenshots

Blisspop

Blisspop uses CM 12 theme Engine. A lot of Customization option just like CyanogenMod, However the UI is totally different. The Interface is nice and clean.

About ROM:

Customize these:

-Status bar
-Navigation bar
-Recent option
-Notification Drawer
-Heads up Notification
-Power Menu option
-App circle bar
-Sound option
-Display and light option
And more
Android version: 6.1.1 Marshmallow
Size:
Credit: Sandeep sethi, Greeshan
Screenshots:-