Apps similar to GhostBSD include Linux Mint, which is free and open source. Other options are Ubuntu, Debian, Fedora and Arch Linux. There's no shortage of Operating Systems like GhostBSD, with more than 100 alternatives for Linux, self-hosting, Mac, Windows and the web.
PorteuX is a Linux distro based on Slackware, inspired by Slax and Porteus and available to the public for free under GPL. Its main goal is to be super fast, small, portable, modular and immutable (if the user wants so).
MirOS BSD is a secure operating system from the BSD family for 32-bit i386 and sparc systems. It is based on 4.4BSD-Lite (mostly OpenBSD, some NetBSD®).
Lightwhale is a purpose-built operating system designed to run Docker containers effortlessly. It live-boots from an ISO straight into a fully functional Docker Engine, eliminating the need for installation or configuration.
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