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Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98, (32-bit and 64-bit) MIPS and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of ... [More]
The ReactOS® project is a ground-up implementation of a Microsoft Windows® XP/2003 compatible operating system. ReactOS aims to achieve complete binary compatibility with both applications and device drivers meant for NT and XP operating systems, by using a similar architecture and providing a ... [More]
The AROS Research Operating System is a lightweight, efficient and flexible desktop operating system, designed to help you make the most of your computer. It's an independent, portable and free project, aiming at being compatible with AmigaOS 3.1 at the API level (like Wine, unlike UAE), while ... [More]
The goal of the Syllable project is to create a family of easy-to-use free software operating systems. It is the continuation of the BeOS-like AtheOS. Syllable Desktop has its own C kernel with symmetric multiprocessing, multithreaded pre-emptive multitasking, high POSIX compliancy, 64-bit ... [More]
Canaima GNU/Linux, la metadistribución venezolana, es un sistema operativo libre y de estándares abiertos basado en el sistema de paquetes APT y de propósito general enfocado a las necesidades del Estado Venezolano. El proyecto Canaima también involucra la plataforma de desarrollo, orientada ... [More]
The Pigeon Mouette BSD project provides a FREE, multi-platform BSD UNIX-like operating system. PmBSD is 'what we think a BSD is' and was totally written from scratch. The only sources stolen by this project were stolen from OpenBSD and are a part of this website and the file sys/queue.h. ... [More]
Yasux ("Yet another simple UNIX") is yet another simple UNIX written from scratch. Its aim is to be a Single UNIX Specification compliant operating system being simple, small in its size and having a source which is easy to understand. This is not achieved by keeping features away, but by ... [More]
A special-purpose 4.4BSD-based UNIX-like operating system, designed for machine control applications. Using low-cost hardware, FabBSD can be used to control a wide array of CNC milling machines, lathes, routers, process-control and automation equipment.
Monarc Operating System KernelMonarc is an experimental and progressive operating system kernel; featuring modern architecture, clean code, and flexible structure. It is implemented in C/C++ and a small amount of assembly. The current platform is x86-32, and soon x86-64. You can see a screenshot of the early GUI here.