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.
Essence Alternatives
Essence is described as 'A desktop operating system built from scratch, for control and simplicity' and is a operating system in the os & utilities category. There are more than 100 alternatives to Essence for a variety of platforms, including Linux, Self-Hosted, BSD, Mac and Windows apps. The best Essence alternative is Arch Linux, which is both free and Open Source. Other great apps like Essence are ReactOS, Lubuntu, Raspberry Pi OS and Puppy Linux.
Alternatives list
- 88 Obarun alternatives
Obarun is a GNU/Linux operating system that relies on s6/66 init and service management suite. The goal of Obarun is to provide an alternative for people looking for more simplicity and transparency in maintaining their systems.


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.

- 136 Karoshi alternatives
Karoshi provides a simple graphical interface that allows for quick installation, setup and maintenance of a network.



GNU-Darwin 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.



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


+3
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

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


- 109 ArcaOS alternatives
A new OS/2-based operating system from Arca Noae, codenamed Blue Lion, arrived today, May 15, 2017, after nearly two years in development.

- 135 miniBSD alternatives
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.

Springdale Linux (SDL) / Formerly known as PUIAS Linux is a RHEL-based Distribution and Mirror. A project of members of the computing staff of ?Princeton University and the ?Institute for Advanced...






















