OpenBSD is described as 'The OpenBSD project produces a FREE, multi-platform 4.4BSD-based UNIX-like operating system. Our efforts emphasize portability, standardization, correctness, proactive security and integrated cryptography' and is a popular operating system in the security & privacy category. There are more than 100 alternatives to OpenBSD for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best OpenBSD alternative is Linux Mint, which is both free and Open Source. Other great apps like OpenBSD are Ubuntu, Debian, Fedora and Arch Linux.
DietPi is a lightweight and optimized operating system mostly targeted against IoT devices. With DietPi you can install specially optimized software with a few clicks. It has an easy-to-use whiptail GUI for its many configuration and system management options and a helpful...
United Kingdom
ReviOS aspires to re-create what Windows as an operating system should have been - easy and simple.
NomadBSD is a persistent live system for USB flash drives, based on FreeBSD. Together with automatic hardware detection and setup, it is configured to be used as a desktop system that works out of the box, but can also be used for data...
Germany
EU
Mageia is a fork of Mandriva Linux formed in September 2010 by former employees and contributors to the popular French Linux distribution. Unlike Mandriva, which is a commercial entity, the Mageia project is a community project and a...
FranceEU
FydeOS offers a choice for regular PCs to behave like Chromebooks with alternative supporting services, on-premise or in the cloud, with or without Google. Formerly known as "Flint OS".
China
New Zealand
Community-led Proof-of-Concept for a common free Operating System for the EU public sector.
GermanyEU
Peppermint OS is a user-friendly operating system that prioritizes mobility, efficiency, and ease of use, allowing users to quickly connect, communicate, and complete tasks without the need for extensive setup or customization.
United States
Oracle Solaris is the #1 enterprise OS, delivering breakthrough high-availability, security, efficiency, and industry-leading scalability/performance.
United States
A purely functional package manager and an advanced distribution of the GNU operating system developed by the GNU Project—which respects the freedom of computer users.
ALT Linux is a set of RPM-based, APT-managed operating systems built on top of the Linux kernel and Sisyphus package repository branches. ALT Linux Rescue is, well, the disaster recovery tool.
Russia
