Slackware is described as 'Linux is an advanced Linux operating system, designed with the twin goals of ease of use and stability as top priorities. Including the latest popular software while retaining a sense of tradition, providing simplicity and ease of use alongside flexibility and power' and is a popular Linux Distro in the os & utilities category. There are more than 100 alternatives to Slackware for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best Slackware alternative is Linux Mint, which is both free and Open Source. Other great apps like Slackware are Ubuntu, Debian, Fedora and Arch Linux.
KolibriOS is a tiny yet incredibly powerful and fast operating system. This power requires only a few megabyte disk space and 8MB of RAM to run. Kolibri features a rich set of applications that include word processor, image viewer, graphical editor, web browser and well over 30...
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.
HP-UX is Hewlett Packard Enterprise's proprietary implementation of the Unix operating system, based on UNIX System V (initially System III) and first released in 1984. Recent versions support the HP 9000 series of computer systems, based on the PA-RISC instruction set...
A warm and cozy, open-source operating system compatible with existing apps, games and drivers. The main idea is to efficiently create a compatible environment for existing software and provide the best user experience on a personal computer.
Latvia
EU
Peropesis is a small-scale, minimalist, command-line-based Linux operating system. It's an incomplete system, but it's constantly being improved. Also, it is a free operating system created from a free software.
Ubuntu Cloud is an open source Linux operating system designed to be used as a personal cloud server. It is based on the well known Ubuntu Linux distribution and recognized as an official Ubuntu flavor, distributed by Canonical.
United States
Minoca OS is a general purpose operating system designed specifically for feature-rich embedded devices. It's got all the high-level functionality that you've come to expect from an operating system, but offers it in a fraction of the memory footprint.
Canada
Bluestar Linux is an Arch Linux-based distribution, built with an understanding that people want and need a solid Operating System that provides a breadth of functionality and ease of use without sacrificing aesthetics.
General purposed Web Desktop Operating Platform / OS for Raspberry Pis, Now written in Go! - tobychui/arozos
carbonOS is designed to be minimal and intuitive. It gets out of your way and lets you focus on your work. Powerful features like system-wide search and the control center make it easy to accomplish quick tasks without opening any other apps.
United Kingdom
