FuryBSD

vs

Alpine Linux

HardenedBSD is a security-enhanced fork of FreeBSD. The HardenedBSD Project is implementing many exploit mitigation and security technologies on top of FreeBSD. Allowing penetration testers and system security experts to enjoy a prebuilt suite of tools on top of FreeBSD.

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.

Rocky Linux is a community-developed, enterprise-grade operating system. The distribution was created to combate the declining trust in CentOS after the aqqustion made by IBM and Red Hat. Rocky Linux aims to provide a free and open, downstream, version-pinned option of REHL (Red Hat Enterprise Linux).

A cloud native environment of software components for the development and management of cloud-native applications developed. The operating system is developed by Oracle, on top of the Linux Kernel and adheres to the Cloud Native Computing Foundation and Open Container Initiative standards. Oracle Linux makes it easy to manage cloud native applications and perform installations, updates and upgrades on the underlying infrastructure.

NixOS is a unique Linux distribution that takes a unique approach to system configuration and package management. The operating system is built on top of the Nix package manage and uses a declarative configuration and allows reliable system upgrades. The open source project started as a research project and has since then grown into a fully fledged operating system with tools dedicated to DevOps and task automation.