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).
The unofficial successor of Antergos, RebornOS is an Arch-based distro that focuses on allowing the user to decide exactly how they want their system while making it easy for anyone to do so - both during installation and afterwards.
MidnightBSD is a new BSD-derived operating system developed with desktop users in mind. It includes all the software you'd expect for your daily tasks — email, web browsing, word processing, gaming, and much more.
Store and share links to docs, files, or literally anything useful. Connect favorite tools for more opportunities. Share and work exclusively with teammates by creating private space or with the whole world with public ones.