Free operating systems
- The FreeDOS Project is a free version of DOS. FreeDOS aims to be a complete, free, 100% ms-dos compatible operating system.
- GNU-Darwin aims to be the most free software distribution. Their mission is two-fold: Focus on projects that leverage their unique combination of Darwin and GNU, and help users to enjoy the benefits of software freedom.
- ReactOS is an advanced free open source operating system providing a ground-up implementation of a Microsoft Windows XP compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for Windows NT and XP operating systems
- Amiga Research Operating System, a free version of AmigaOS 3.1, is a lightweight, efficient and flexible desktop operating system, designed to help you make the most of your computer.
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