Maru is described as 'makes personal computing more context-aware by giving you the best interface for your environment. That means when you're on the go, Maru is your phone; when you're at your desk, Maru is your desktop' and is a Android ROM in the os & utilities category. There are more than 25 alternatives to Maru for a variety of platforms, including Android, Linux, Android Tablet, Linux Mobile and Windows. The best alternative is Android, which is both free and Open Source. Other great apps like Maru are LineageOS, Ubuntu Touch, Android-x86 and /e/.
Maru is mainly a Operating System but alternatives to it may also be Mobile OSs or Android ROMs. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of Maru.
Slim ROM is super-lightweight Android ROM for Samsung Galaxy phones, that's aimed at advanced users. Slim is designed to trim the fat down to the bare essentials and give you a fast and clean Android installation.
An AOSP based ROM which provides stock UI / UX with various customisation features along with the Substratum theme engine. The project has been made by cherry picking various commits from various other projects.