Chromium OS is described as 'Open-source project, used primarily by developers, that aims to build an operating system that provides a fast, simple, and more secure computing experience for people who spend most of their time on the web' and is a operating system in the os & utilities category. There are more than 100 alternatives to Chromium OS for a variety of platforms, including Linux, Self-Hosted, Windows, BSD and Mac apps. The best Chromium OS alternative is Linux Mint, which is both free and Open Source. Other great apps like Chromium OS are Ubuntu, Debian, Fedora and Arch Linux.