RetroBSD is a port of 2.11BSD Unix intended for embedded systems with fixed memory mapping. The current target is Microchip PIC32 microcontroller with 128 kbytes of RAM and 512 kbytes of Flash.
GNU-Darwin Alternatives
GNU-Darwin is described as 'Aims to be the most free software distribution. Our mission is two-fold: Focus on projects that leverage our unique combination of Darwin and GNU, and help users to enjoy the benefits of software freedom' and is a operating system in the os & utilities category. There are more than 100 alternatives to GNU-Darwin for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best GNU-Darwin alternative is Linux Mint, which is both free and Open Source. Other great apps like GNU-Darwin are Debian, Fedora, Arch Linux and elementary OS.
Alternatives list
Sourcemage is a source-based GNU/Linux distribution based on a Sorcery metaphor of 'casting' and 'dispelling' programs, which we refer to as 'spells'.



- 143 Ubuntu Cloud alternatives
Ubuntu Cloud is an open source Linux operating system designed to be used as a personal cloud server. It is based on the well known Ubuntu Linux distribution and recognized as an official Ubuntu flavor, distributed by Canonical.
Cost / License
- Free
- Open Source
Platforms
- Linux
Karoshi provides a simple graphical interface that allows for quick installation, setup and maintenance of a network.



Darwin is the Open Source operating system from Apple that forms the basis for Mac OS X, and PureDarwin is a community project to make Darwin more usable (some people think of it as the informal successor to OpenDarwin.

BeeFree OS is inspired from Ubuntu, Windows 7 and Linux Mint. The name is acronym for Beautiful, Effective, Efficient and Freedom.


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- 104 ULinux alternatives
ULinux is based on openSUSE, and is a free linux distribution with the aim of combining the DIY-approach of Arch with the setup of Ubuntu.
Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Linux

Cost / License
- Free
- Proprietary
Application types
Alerts
- Discontinued
Platforms
- Mac
- Windows
- Linux




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Visopsys (VISual OPerating SYStem) is an alternative operating system for PC-compatible computers, written “from scratch”, and developed primarily by a single hobbyist programmer since 1997.


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miniBSD is a project to develop a set of scripts that shrinks a running FreeBSD system to a small sized miniBSD distribution suited for small media like USB pens and CF cards.



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