



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.




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.

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.
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.




RebeccaBlackOS is a Debian-based live distribution which can be used to run Wayland desktop sessions. RebeccaBlackOS can run a number of popular open source desktop environments on top of a Wayland graphical session.




Enso aims to be a clean and simple OS that is easy to use and incorporates some of our favourite projects from around the Linux world.




Pearl Linux OS has been available for free download since 12/2014 with our first release simply titled Pearl Linux. It was based on the 14.04 released version of Ubuntu. That release was using the XFCE desktop environment.




ExectOS aims to be a stable and flexible, general purpose operating system written from scratch. It is designed to be modular, maintainable and compatible with existing software. It implements a brand new XT architecture and features own native application interface.




Spaced Linux is a polished desktop distribution built on Devuan Ceres, using sysvinit, MATE, and Compiz. It welcomes first-time Linux users without hiding the system from experienced users who want to inspect, customize, automate, and rebuild it.
