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Syllable Desktop is a complete operating system that is easy to use, powerful, lightweight and extraordinarily fast and responsive. It has its own kernel, filesystem, GUI and applications. Syllable Server is a matching small and efficient Linux server.119 weekly downloads
Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.47 weekly downloads
Embedded Operating System2 weekly downloads
Industrial embedded Linux for Raspberry Pi3 weekly downloads
An open source operating system for x86.1 weekly downloads
StepOS is an open-source operating system that is designed solely to run StepMania, the popular 'dance simulation game', on arcade dedicated cabinets, and is easy to install and maintain. StepOS is based off of the open-source operating system ReactOS.2 weekly downloads
XSystem Kernel Project - an object-oriented 32-bit protected-mode operating system for IA32-architecture.1 weekly downloads
BNL OS is a free, modern operating system based on the design of Windows XP/2003.This is not a Linux based system, and shares none of the unix architecture. Please remember, this is in the development stage, and is not reccommended for everyday use.1 weekly downloads
The project aim to create a microkernel-based operating system from scratch.1 weekly downloads
FreeOS/1 is a Free, Open Source, FreeDOS based Free and Open Source Alternative OS, with open source Microsoft Windows compatibility using HXDOSExtender KernelEx,and ReactOS source code. FreeOS/1 will include new technologies and will be easy to use1 weekly downloads
A XUbuntu Based Distro1 weekly downloads
MDF is microkernel operating system. Module architecture minimalistic design.1 weekly downloads
A new OS1 weekly downloads
a small, x86 Operating System, developed in C++ and NASM, aimed to give the user a closer relationship with the hardware.1 weekly downloads
A little operative system with File System, Process Manager, but without a Grafical User Interface :'(
AxionOS is (to be) a operating system for the Axion Prototype Computer (APC) which is basically a notebook. Currently the project is in its childhood, but the idea is simple - To create an intuitive, user-friendly operating system for the APC.
CJet eXTreme OS is a new project to develop a cross platform operating system with a native application interface designed to make it easy to develop for several architectures at once.
New Linux Based OS primarily for smart devices and PDA's, laptops, and eventually desktops. It offers an alternative to the "embedded" approach. All OS versions and applications will be hosted and then made available to the subscribers of cloud svs
The future of information technology will be based on controlling the flow of natural light. This project is an attempt to establish the code (or software) that will enable this to happen. It involves rewriting an OS from the ground up.
A fork of the QEMU emulation system to allow all people to run multiple OS systems from a main system drive or partition such that they can provide their OS machines with whatever degree of direct hardware access or emulated hardware access needed.
FOS - open source 32-bit microkernel operating system.
Flip OS is a open source OS based off of ReactOS. We write the code using the ROS Code as a guide.
GJ Universal OS is a operating system that aims to be binary compatible with windows, while having a nice look and feel.
(Main Project) The Independent Innovative Free-Libre Open-Source Software public project's mission is to create, as an open community, the perfect conceptually new feature-complete free-libre open-source operating system from scratch.