A curated list of notable alternative free operating systems.
Note that this project is heavily work in progress!
This project (which doesn't include icons and other code or data included in 3rd party section below) is licensed under CC0-1.0 license, which means that anyone can use, modify, and distribute the work for any purpose, including commercial use, without asking permission or providing attribution (although contributions are welcome).
Icons used in the project are taken from the Simple Icons website and are licensed under CC0 license, although as mentioned in the linked disclaimer it doesn't imply that all icons within the projects are also CC0-licensed.