

ReactOS is described as 'FOSS effort to develop a quality operating system based on the architecture of Microsoft® Windows NT family of operating systems, that is compatible with applications and drivers written for it (NT4, 2000, XP, 2003, Vista, 7)' and is a very popular operating system in the os & utilities category. There are more than 100 alternatives to ReactOS for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best ReactOS alternative is Linux Mint, which is both free and Open Source. Other great apps like ReactOS are Fedora, Arch Linux, Zorin OS and Proton.


AriOS is an easy-to-use operating system based on Ubuntu. AriOS comes with a unique and optimized interface as well as many extra applications, multimedia codecs, flash and java plugins, and many tweaks! AriOS is not just Ubuntu+extra programs. It has been carefully desig.




Vinux is a Ubuntu derived distribution optimised for the needs of blind and partially sighted users. By default Vinux provides two screen-readers, Braille display support and an extremely friendly community.
The Friend Unifying Platform is a powerful open source framework that will allow developers to decouple their applications from technology silos. It will empower developers to swiftly deploy on and integrate with Ethereum and other decentralised technologies in a new blockchain...

A new OS/2-based operating system from Arca Noae, codenamed Blue Lion, arrived today, May 15, 2017, after nearly two years in development.


Calculate Linux is based on Gentoo that is well known for its stability and great performance on a broad range of hardware: from Pentium Pro to modern CPUs.
Risc OS is an open-source OS specifically designed to run on the ARM chipset.




Lunar Linux is a source based Linux distribution. It is built entirely by compiling source code, using custom optimizations.
ParticleOS is a fully customizable immutable distribution implementing the concepts described in Fitting Everything Together.
Obarun is a GNU/Linux operating system that relies on s6/66 init and service management suite. The goal of Obarun is to provide an alternative for people looking for more simplicity and transparency in maintaining their systems.

