FreeDOS (formerly Free-DOS and PD-DOS) is a free operating system for IBM PC compatible computers. It intends to provide a complete DOS-compatible environment for running legacy software and supporting embedded systems.
License: Open Source
FreeDOS is an open-source operating system that offers flexibility, active development, and compatibility with a wide range of hardware, making it suitable for modern users and developers. In contrast, MS-DOS is a proprietary system that provides stability and official support, but it is limited to older hardware and lacks active development.