Haiku is described as 'Open-source operating system that specifically targets personal computing. Inspired by the BeOS, Haiku is fast, simple to use, easy to learn and yet very powerful' and is a very popular operating system in the os & utilities category. There are more than 100 alternatives to Haiku for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best Haiku alternative is Linux Mint, which is both free and Open Source. Other great apps like Haiku are Ubuntu, Debian, Arch Linux and Fedora.
Athena OS is an Arch-derived Linux distribution designed for penetration testing, bug-bounty hunting and InfoSec students. The distribution provides a way to connect directly to some of the e-learning hacking resources, such as Hack The Box, Offensive Security, PWNX and InfoSec...
GoboLinux is a modular Linux distribution: it organizes the programs in your system in a new, logical way.
Pentoo is a security-focused livecd based on Gentoo. It's basically a Gentoo install with lots of customized tools, a customized kernel, and much more.
DeLi(cate) is a fork of DeLi Linux 0.8 targeted at very old and low RAM computers. It also works very efficiently on ordinary computers where you want to run lightweight applications and avoid the bulk of ordinary distributions.
Infinitive OS is an open-source project created to replace windows and macOS, it mounts the latest versions of the Linux kernel and contains open source components but also proprietary software. It has the KDE desktop environment pre-installed
A warm and cozy, open-source operating system compatible with existing apps, games and drivers. The main idea is to efficiently create a compatible environment for existing software and provide the best user experience on a personal computer.
SolydX and SolydK are Debian based distributions with the Xfce and KDE Plasma desktop. SolydXK aims to be simple to use, providing an environment that is both stable and secure.
An open-source OS for exploration, creation, and play. Kano OS is based on the Raspbian OS which itself is based on Debian, a Linux based operating system.
BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.
openmamba GNU/Linux is a ready-to-use operating system for netbooks, notebooks, desktop and server personal computers.
Neptune is a GNU/Linux Distribution for desktops based fully upon Debian Stable. It ships with a modern KDE Plasma Desktop with its main view on a good looking multimedia system which allows for getting work done.
Community-led Proof-of-Concept for a common free Operating System for the EU public sector.
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