RISC OS is described as 'Risc OS is an open-source OS specifically designed to run on the ARM chipset' and is an app in the OS & Utilities category. There are more than 100 alternatives to RISC OS for a variety of platforms, including Linux, BSD, Self-Hosted solutions, Windows and Mac. The best alternative is Ubuntu, which is both free and Open Source. Other great apps like RISC OS are Manjaro Linux (Free, Open Source), Arch Linux (Free, Open Source), Windows 10 (Paid) and Fedora (Free, Open Source).
Fast and powerful operating system based on the latest technologies while offering highly productive desktop environment. We focus on security, reliability, long-term stability and conservative integration of verified new features.
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. * OpenBSD runs on many different hardware platforms.
Peppermint was designed for enhanced mobility, efficiency and ease of use. While other operating systems are taking 10 minutes to load, you are already connected, communicating and getting things done.
Knoppix is an operating system based on Debian designed to be run directly from a CD / DVD (Live CD) or a USB key (Live USB), one of the first of its kind for any operating system. When starting a program, it is loaded from the removable medium and decompressed into a RAM drive.
CloudReady is a operating system built and maintained by Neverware. Based on Google’s open source Chromium OS, CloudReady uses web apps and both cloud storage (Google Drive) as well as local storage (File manager). Comes without Android app support.