Custom ROMs and larger, crisper screens were believed to be the two biggest reasons for users going for Android smartphones over others, like iOS-based offerings. With Apple having introduced larger screen sizes with iPhone 6 Plus and iPhone 6s Plus, the display quality is still lacking and more importantly, the OS remains closed unless painstakingly jailbroken. For those of our readers who cherish the possibilities of being able to customize their devices and enhance the overall performance (with a huge chance of things going the wrong way), we are putting together some of the best Android 6.0 and 6.0.1 Marshmallow based custom ROMs. Custom ROMs not only enable users to try out different tweaks and looks for their devices, but also offer the latest Android software earlier than the OEMs and carriers who are notorious for delaying Android updates.

While the Android 6 Marshmallow adoption rate doesn't tell any surprising story as the operating system has always remained popular for slow growth. There are still hundreds of thousands of users trying out unofficial firmware being offered by developers. With Android 6.0.1 Marshmallow already released, it's time to say hello to the Android 6 with a stable Marshmallow custom ROM designed for your Samsung, LG, HTC, and other Android devices.

- Tips to Fix Samsung Galaxy S7 and S7 edge Battery Drain Issues

Top Marshmallow custom ROM choices for your devices:

The following list has been organized by devices and manufacturers, followed by another with links to official/download pages of the custom ROMs based on Marshmallow. Many of the custom ROMs are still in the development stage, and may affect some functionality of the OS. Please don't try the custom firmware unless you are confident with the procedure and are aware of the downsides of flashing unofficial firmware.

Marshmallow ROMs for HTC:

• CandySix Android 6.0.1 for HTC One M9
• crDroid Android 6.0.1 for HTC One M9

• Resurrection Remix Android 6.0.1 for HTC One M8
• AICP Android 6.0.1 for HTC One M8 
• WOLLA Android 6.0 Marshmallow custom ROM for HTC One M8
• S-ROM Android 6.0 for HTC One M8

• crDroid Android 6.0 for HTC One M7 

Best Marshmallow custom ROM options for Samsung devices:

• CM13 Android 6.0.1 Marshmallow for Galaxy S5 G900F
• CM13 Android 6.0 Marshmallow on Samsung Galaxy S5 G900F

• Resurrection Remix Android 6.0.1 for Galaxy S4 I9505
• AICP Android 6.0.1 for Galaxy S4 LTE I9505
• Resurrection Remix Android 6.0.1 for T-Mobile Galaxy S4 M919
• crDroid Android 6.0 for Galaxy S4 I9505

• CyanogenMod 13 Android 6.0 for Galaxy S3 I9300
• CM13 Android 6.0.1 on Samsung Galaxy S3 T999
• OctOS Marshmallow for Galaxy S3 I337

• BlissPop Android 6.0.1 for Galaxy Note 4 N910F
• CM13 for Galaxy Note 4 N910F

• Resurrection Remix Android 6.0.1 for Galaxy Note 3
• Temasek Android 6.0.1 for  Galaxy Note 3 N9005
• CM13 Android 6.0 Custom ROM on Galaxy Note 3 N9005

LG Android 6.0 Marshmallow ROMs:

• CyanogenMod 13 Android 6.0 for LG G4
• CM13 Android 6.0 Custom ROM for LG G3

Android 6.0 and 6.0.1 based custom ROMs for xusxus:

• CyanogenMod for Nexus 5X

• CM13 Android 6.0 for Nexus 6
• Android 6.0.1 AICP for LG Nexus 4
• Chroma Android 6.0.1 for Nexus 4
• Chroma Android 6.0 for Nexus 4
• BlissROM Android 6.0.1 for Nexus 7

Marshmallow ROMs for Sony:

• CM 13 Android 6.0.1 Marshmallow for Xperia Z3

Android 6 Marshmallow custom ROMs - Misc:

Unofficial Beanstalk

• CM Based
• Notification Bar Customization
• Circle Battery
• Lots of Beanstalk goodies

AICP

(Available for Galaxy S4 I9505, Note 3, Nexus 4 and other Android devices)

Dirty Unicorns

• A double tap to sleep and wake device
• OmniSwitch floating toolbar
• Disable immersive mode messages
• Expanded power menu
• Data flow indicators
• Ad blocker
• Quick Settings
• Clock changes

(Available for Galaxy Note 4, Galaxy Note 3, Galaxy S5, Galaxy S4, Galaxy S3, LG G4, LG G3, LG G2, HTC One M9, HTC One M8, Motorola Moto G (2014) and Moto X (2014))

Cataclysm:

• Quick Torch
• Immersive mode
• Flash on notifications
• Smart timeout
• Smart Radio
• AppOps
• InCall blocker
• Custom HeadsUp timeout
• Quick Settings customisation
• Navigation bar customisation
• LED customisation
• Advanced Reboot menu
• Battery icon customisation
• Battery saver scheduler

(Available for Nexus 5, Nexus 6 and other devices)

Chroma ROM

• Navigation bar customisation
• Lock screen customisation
• Status bar customisation
• Volume rocker wake
• Quick Unlock
• Quick Settings customisation
• Improved VoLTE reception
• Double tap power button to launch camera

(Available for  various Nexus devices)

Resurrection Remix

• Dark Material Theme
• Quick-Smart Pulldown
• Buttons
• Battery mods
• Heads up
• Lockscreen Shortcuts
• ClockColor options
• Statusbar clock customization + second + fonts
• Network traffic monitor
• Toast animations
• Add changelog
• Listview animations
• Navigation bar dimensions
• Add Weather display to status bar header
• Quick unlock
• Overall Speed up system
• Amazing Battery Life
• Brand new music and audio fx app from cyanogen
• Included all cm 13 features

(Available for Galaxy S4 M919, Galaxy S4 I9505, Galaxy Note 3, HTC One M8, and various other devices)

As new ROMs are being developed and released, we will keep this list updated. With that said, don't forget to share your own favorite custom ROMs with us too. This would enable us to customize and make this list better and more helpful for our readers. Happy flashing!