Android - Android is an open source mobile operating system initially released by Google in 2008 and has since become of the most widely used operating systems on any platform.
Kali Nethunter - Android ROM that is designed for hacking/penetration testing.
PureOS - A user friendly, secure and freedom respecting OS for your daily usage
iodé - iodé is an operating system powered by LineageOS and based on the Android mobile platform. iodé aims at protecting the user's privacy with a built-in adblocker and by freeing the smartphone from snitches.
CalyxOS - Privacy-focused operating system for smartphones based on Android and microG
LineageOS - Operating system for smartphones and tablet computers, based on the Android