Serenity is a graphical 32-bit Unix-like operating system with 90s aesthetics and built for x86 systems.


RISC OS is described as 'Risc OS is an open-source OS specifically designed to run on the ARM chipset' and is a operating system in the os & utilities category. There are more than 100 alternatives to RISC OS for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best RISC OS alternative is Linux Mint, which is both free and Open Source. Other great apps like RISC OS are Ubuntu, Debian, Fedora and Arch Linux.
Serenity is a graphical 32-bit Unix-like operating system with 90s aesthetics and built for x86 systems.


Bedrock Linux is a meta Linux distribution which allows users to utilize features from other, typically mutually exclusive distributions. Essentially, users can mix-and-match components as desired. For example, one could have:
illumos is a free and open-source Unix operating system. It derives from OpenSolaris, which in turn derives from SVR4 UNIX and Berkeley Software Distribution (BSD). illumos comprises a kernel, device drivers, system libraries, and utility software for system administration.
A Fast, friendly, open-source operating system, for newbies, geeks & DIY enthusiasts.




CrunchBang++ is an open source and completely free [of cost (#!++ does include several of Debian’s non-free packages as well as the non-free repository)] computer operating system, designed as a continuation of the .




A project providing a fully free (as in freedom) derivative of Arch Linux. Inheriting Arch's lightweight and flexibility, Parabola offers software freedom plus all power to the users.



Dragora GNU/Linux is a distribution created from scratch with the intention of providing a stable, multi-platform and multi-purpose operating system. It is built upon 100% free software. It has a very simple packaging system that allows installing, removing, upgrading and...



GoboLinux is a modular Linux distribution: it organizes the programs in your system in a new, logical way.




Elive provides a dynamic and clean interface without saturating the look. Nothing in the desktop is static. Simplicity and intuitive is one of its best points.




openmamba GNU/Linux is a ready-to-use operating system for netbooks, notebooks, desktop and server personal computers.

The CLIP OS project is an open source project maintained by the ANSSI (National Cybersecurity Agency of France) that aims to build a secure, multi-level operating system, based on the Linux kernel and a lot of free and open source software.
Xinuos OpenServer™ 10 is a 64-bit operating system based on the popular FreeBSD and designed to support business applications within an enterprise environment.