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, Windows, BSD and Mac apps. The best ReactOS alternative is Linux Mint, which is both free and Open Source. Other great apps like ReactOS are Arch Linux, Fedora, Manjaro Linux and openSUSE.
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.
BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.
Beautiful, Open, and Free - Trenta OS is a Linux based operating system that aims to compete graphically with some well known premium operating systems but in the free & open-source Linux world.
instantOS is a Manjaro based distro that works out of the box but is still aimed at power users. Everything is lightning fast and works out of the box.
MorphOS is an AmigaOS-like computer operating system. It is a mixed proprietary and open source OS produced for the PowerPC processor based computers.
MidnightBSD is a new BSD-derived operating system developed with desktop users in mind. It includes all the software you'd expect for your daily tasks — email, web browsing, word processing, gaming, and much more.
With the release of GNOME 3.38.0, we started producing and distributing bootable VM images for debugging and testing features before they hit any distribution repository. We called the images GNOME OS. The name itself is not new, and what it stands for has not changed...
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.
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.
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