The Universal Blue project builds a diverse set of continuously delivered operating system images using Fedora Atomic Desktop's support for OCI/Docker containers.
That's nerdspeak for the ultimate Linux client: the reliability of a Chromebook, but with the flexibility and power of a traditional Linux desktop.

• Universal Blue @ GitHub.
• Universal Blue Architecture Diagram.
• Episode 573 - Universal Blue Man Group @ Linux Unplugged.

Siduction is an operating system based on the Linux kernel and the GNU project. In addition, there are applications and libraries from Debian.
The name siduction is a play on two words. The word sid, which is the codename of Debian Unstable, and seduction in the sense of seduce.

Rolling Rhino Remix is an unofficial Ubuntu flavour which converts the Ubuntu operating system into a rolling release Linux distribution by tracking the devel series.

Calculate is a fast and functional user-friendly Linux distribution, based on Gentoo and still backward compatible with it. It maintains an optimal balance between state-of-the-art and stability, providing the latest versions of applications and stable versions of libraries. As Calculate Linux is a rolling-release distribution, you install the system once and update it throughout the life of your hardware.