DietPi
Link
Excerpt
Highly optimised minimal Debian OS
DietPi is extremely lightweight at its core, with features of low process/memory footprint and DietPi-RAMlog installed by default, to get the maximum performance from your device.
Notes
- Debian-based OS optimized for Single Board Controllers such as Raspberry Pi
- Recommended by dendron://claus.people/user.lastname.zeeberg.simon