Rhino Linux is a Ubuntu-family Linux distribution based on Ubuntu Devel. Rolling-release Ubuntu distribution with Pacstall AUR-like package manager and Unicorn desktop.
Strengths: Brings true rolling release to the Ubuntu ecosystem; Pacstall provides an AUR-like recipe builder for Ubuntu; Unicorn desktop offers a modern phone/tablet-like app grid. Trade-offs: Ubuntu devel branch can occasionally have breakages; Relatively young project.