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.
VS
Besgnulinux
Besgnulinux is a lightweight, desktop Linux distribution based on Debian's "stable" branch. Using the JWM window manager, it is designed to be fast, lightweight and easy to use, suitable for older and low-specification computers.