FreeBSD

vs

Elementary OS

GhostBSD is a free an open-source operating system based on FreeBSD. GhostBSD comes pre-installed with MATE desktop, OpenRC, the LibreOffice suite and OS packages for simplicity adn ease-of-use.

MidnightBSD is a free and open-source desktop operating system for x86 and x86-64 based PCs. The OS is originally forked from FreeBSD 6.1, and periodically updated with code and drivers from later FreeBSD releases. The developers behind MidnightBSD has been stringing since 2006 create an easy-to-use operating system that everyone can use, freely. 

OpenBSD is a free and open-source, security-focused, Unix-like operating system based on the Berkeley Software Distribution. For over 25 years OpenBSD has been developed by a community of volunteers funded through contributions collected by The OpenBSD Foundation. OpenBSD is freely available and can be used on most hardware, including Alpha, x86-64, ARMv7, ARMv8 (64-bit), PA-RISC, IA-32, LANDISK, Omron LUNA-88K, Loongson, MIPS64, PowerPC, SPARC64.

Pop!_OS is a free and open-source Linux operating system for STEM and creative professionals who use their computer as a tool to discover and create. Pop!_OS is openly developed and released by the Linux hardware manufacturer System76. With Pop!_OS  you can unleash your potential on secure, reliable open source software. Pop!_OS is designed for fast navigation, easy workspace organization, and fluid, convenient workflow. Your operating system should encourage discovery, not obstruct it.

A Linux distribution that is designed from the ground-up to be a replacement for Windows or macOS. With Zorin OS you can get to know Linux quickly with a desktop environment similar to your previous experience with the commercial operating systems. Zorin OS let's you choose a desktop layout that mimic your previous OS, be it Windows or macOS. The operating system is built on-top of Ubuntu and runs on the same open-source software that powers the U.S. Department of Defense, NASA, and more.

Debian is a free and open-source operating system and GNU/Linux distribution that is openly developed by the community-supported Debian Project. The distribution was first released in 1993 and today it is the base of many other Linux-based distribution such as the popular Ubuntu. The project includes over 59000 packages, precompiled software bundled up for easy installation on your machine.