FydeOS
FydeOS, developed by Fyde Innovations, is a lightweight operating system that carries a Linux kernel, a browser platform and a container technology driver. It is very similar to Google ChromeOS in use.
VS
CuerdOS
CuerdOS is a Debian-based GNU/Linux distribution with focus on stability, efficiency and performance. It comes with a series of optimisations, such as performance and memory consumption improvements.