SerenityOS is described as 'Serenity is a graphical 32-bit Unix-like operating system with 90s aesthetics and built for x86 systems' and is a operating system in the system & hardware category. There are more than 100 alternatives to SerenityOS for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best SerenityOS alternative is Tails, which is both free and Open Source. Other great apps like SerenityOS are Zorin OS, Lubuntu, Rocky Linux and Void Linux.
Founded in 2014 by Oliver Pinter and Shawn Webb, HardenedBSD is a security-enhanced fork of FreeBSD. The HardenedBSD Project is implementing many exploit mitigation and security technologies on top of FreeBSD.
Frugalware Linux is an independently developed general purpose desktop Linux distribution designed for intermediate users. It follows simple Slackware -like design concepts and includes the .
Mabox Linux is based on Manjaro, featuring a customized Openbox window manager preconfigured to be ready to use.
Poland
EU
Darwin is the Open Source operating system from Apple that forms the basis for Mac OS X, and PureDarwin is a community project to make Darwin more usable (some people think of it as the informal successor to OpenDarwin.
Karoshi provides a simple graphical interface that allows for quick installation, setup and maintenance of a network.
BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.
Ubuntu Cloud is an open source Linux operating system designed to be used as a personal cloud server. It is based on the well known Ubuntu Linux distribution and recognized as an official Ubuntu flavor, distributed by Canonical.
United States
GNU-Darwin aims to be the most free software distribution. Our mission is two-fold: Focus on projects that leverage our unique combination of Darwin and GNU, and help users to enjoy the benefits of software freedom.
ULinux is based on openSUSE, and is a free linux distribution with the aim of combining the DIY-approach of Arch with the setup of Ubuntu.
United Kingdom
