Raspbian - Welcome to Raspbian. Raspbian is a free operating system based on Debian optimized for the Raspberry Pi hardware. An operating system is the set of basic programs and utilities that make your Raspberry Pi run.
Ubuntu - Ubuntu is a Debian Linux-based open source operating system for desktop computers.
OSMC - OSMC is a free and open source media center built for the people, by the people.
Manjaro - Manjaro Linux is a linux distribution which is based on arch linux. It uses the PACMAN package manager.
VortexBox - vBulletin Forums
GrapheneOS - GrapheneOS is an open source privacy and security focused mobile OS with Android app compatibility.