SettingsFree software operating systems
386BSD
386BSD, sometimes called "Jolix", was a free Unix-like operating system based on BSD, first released in 1992.
386BSD, sometimes called "Jolix", was a free Unix-like operating system based on BSD, first released in 1992.
Arch Hurd
Arch Hurd is an operating system based on Arch Linux, but uses GNU Hurd kernel instead of Linux.
Arch Hurd is an operating system based on Arch Linux, but uses GNU Hurd kernel instead of Linux.
AROS Research Operating System
AROS Research Operating System (AROS - pronounced "AR-OS") is a free and open source multi media centric implementation of the AmigaOS 3.1 APIs. Designed to be portable and flexible, ports...
AROS Research Operating System (AROS - pronounced "AR-OS") is a free and open source multi media centric implementation of the AmigaOS 3.1 APIs. Designed to be portable and flexible, ports...
Berkeley Software Distribution
Berkeley Software Distribution (BSD, sometimes called Berkeley Unix) is a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of ...
Berkeley Software Distribution (BSD, sometimes called Berkeley Unix) is a Unix operating system derivative developed and distributed by the Computer Systems Research Group (CSRG) of ...
Blue Jay Project
Blue Jay is an operating system with a monolithic kernel, all written in NASM assembly language, for 16-bit x86 architecture computers, by Robert Looney.
Blue Jay is an operating system with a monolithic kernel, all written in NASM assembly language, for 16-bit x86 architecture computers, by Robert Looney.
Bluebottle OS
Bluebottle (formerly known as AOS and recently as A2) is the next generation Native Oberon, the Oberon operating system for bare PC hardware.
Bluebottle (formerly known as AOS and recently as A2) is the next generation Native Oberon, the Oberon operating system for bare PC hardware.
ChibiOS/RT
ChibiOS/RT is a compact and fast real-time operating system supporting multiple architectures and released under the GPL3 license.
ChibiOS/RT is a compact and fast real-time operating system supporting multiple architectures and released under the GPL3 license.
Contiki
Contiki is a small, open source, highly portable, multitasking computer operating system developed for use on a number of memory-constrained networked systems ranging from 8-bit computers to emb...
Contiki is a small, open source, highly portable, multitasking computer operating system developed for use on a number of memory-constrained networked systems ranging from 8-bit computers to emb...
CP/M
CP/M (Control Program for Microcomputers) was a mass-market operating system created for Intel 8080/85 based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to sin...
CP/M (Control Program for Microcomputers) was a mass-market operating system created for Intel 8080/85 based microcomputers by Gary Kildall of Digital Research, Inc. Initially confined to sin...
CP/M-86
CP/M-86 was a version of the CP/M operating system that Digital Research made for the Intel 8086 and Intel 8088.
CP/M-86 was a version of the CP/M operating system that Digital Research made for the Intel 8086 and Intel 8088.
Darwin (operating system)
Darwin is an open source POSIX-compliant computer operating system released by Apple Inc. in 2000.
Darwin is an open source POSIX-compliant computer operating system released by Apple Inc. in 2000.
Debian GNU/kFreeBSD
Debian GNU/kFreeBSD is an operating system released by the Debian project.
Debian GNU/kFreeBSD is an operating system released by the Debian project.
Doscore
Originally the project Doscore was known as Phoenix OS but due to the fact that there was a Linux Distribution carrying the same name the project was scrapped and reborn as Doscore.
Originally the project Doscore was known as Phoenix OS but due to the fact that there was a Linux Distribution carrying the same name the project was scrapped and reborn as Doscore.
DuinOS
DuinOS is a real-time operating system with a preemptive multitasking system for Arduino and Atmel AVR based boards.
DuinOS is a real-time operating system with a preemptive multitasking system for Arduino and Atmel AVR based boards.
eCos
eCos (embedded configurable operating system) is an open source, royalty-free, real-time operating system intended for embedded systems and applications which need only one process with mult...
eCos (embedded configurable operating system) is an open source, royalty-free, real-time operating system intended for embedded systems and applications which need only one process with mult...
EmuTOS
EmuTOS is a replacement for TOS (the operating system of the Atari ST and its successors), released as free software.
EmuTOS is a replacement for TOS (the operating system of the Atari ST and its successors), released as free software.
es (operating system)
es is a computer operating system developed originally by Nintendo and since 2008 by Google.
es is a computer operating system developed originally by Nintendo and since 2008 by Google.
FreeDOS
FreeDOS (formerly Free-DOS and PD-DOS) is an operating system for IBM PC compatible computers.
FreeDOS (formerly Free-DOS and PD-DOS) is an operating system for IBM PC compatible computers.
Freedows OS
Freedows OS was an open source attempt at creating a MS-Windows clone for x86 platforms, intended to be released under the GNU General Public License, started in 1996 by Reece K. Sellin, an unde...
Freedows OS was an open source attempt at creating a MS-Windows clone for x86 platforms, intended to be released under the GNU General Public License, started in 1996 by Reece K. Sellin, an unde...
FreeRTOS
FreeRTOS is a real-time operating system for embedded devices, being ported to several microcontrollers.
FreeRTOS is a real-time operating system for embedded devices, being ported to several microcontrollers.
FreeVMS
FreeVMS is a free software clone of the VMS computer operating system, licensed under the terms of the GNU General Public License.
FreeVMS is a free software clone of the VMS computer operating system, licensed under the terms of the GNU General Public License.
FreeWRT
FreeWRT is a Linux distribution for embedded systems like wireless routers by Linksys and Asus.
FreeWRT is a Linux distribution for embedded systems like wireless routers by Linksys and Asus.
GNU
GNU is a Unix-like computer operating system developed by the GNU project, ultimately aiming to be a "complete Unix-compatible software system" composed wholly of free software.
GNU is a Unix-like computer operating system developed by the GNU project, ultimately aiming to be a "complete Unix-compatible software system" composed wholly of free software.
GNU Hurd
GNU Hurd is a free software Unix-like replacement for the Unix kernel, released under the GNU General Public License.
GNU Hurd is a free software Unix-like replacement for the Unix kernel, released under the GNU General Public License.
GNU variants
GNU variants is a term used by the Free Software Foundation and others to refer to operating systems which use application software and system libraries (in other words, the core userland) from GNU.
GNU variants is a term used by the Free Software Foundation and others to refer to operating systems which use application software and system libraries (in other words, the core userland) from GNU.
Haiku (operating system)
Haiku is a free and open source operating system compatible with BeOS. Its development began in 2001, and the operating system became self-hosting in 2008, with the first alpha release in Septem...
Haiku is a free and open source operating system compatible with BeOS. Its development began in 2001, and the operating system became self-hosting in 2008, with the first alpha release in Septem...
HDOS
HDOS is an early microcomputer operating system, originally written for the Heathkit H8 computer system and later also available for the Heath H89 and Zenith Z-89 computers.
HDOS is an early microcomputer operating system, originally written for the Heathkit H8 computer system and later also available for the Heath H89 and Zenith Z-89 computers.
House (operating system)
House is an acronym for the Haskell User's Operating System and Environment.
House is an acronym for the Haskell User's Operating System and Environment.
HydrixOS
HydrixOS is a project that aims to develop a free operating system published under the GNU General Public License.
HydrixOS is a project that aims to develop a free operating system published under the GNU General Public License.
IPFire
IPFire is a free Linux distribution which acts as a router and firewall in the first instance.
IPFire is a free Linux distribution which acts as a router and firewall in the first instance.
JNode
JNode (Java New Operating System Design Effort) is a free software project to create a Java platform operating system.
JNode (Java New Operating System Design Effort) is a free software project to create a Java platform operating system.
JX (operating system)
JX is a microkernel operating system with both the kernel and applications implemented using the Java programming language.
JX is a microkernel operating system with both the kernel and applications implemented using the Java programming language.
K42
K42 is an open-source research operating system for cache-coherent 64-bit multiprocessor systems.
K42 is an open-source research operating system for cache-coherent 64-bit multiprocessor systems.
KolibriOS
Kolibri or KolibriOS is a small open source x86 operating system written completely in assembly.
Kolibri or KolibriOS is a small open source x86 operating system written completely in assembly.
LINX (IPC)
LINX is a new generation of the OSE Link Handler that provides higher performance and more robust functionality.
LINX is a new generation of the OSE Link Handler that provides higher performance and more robust functionality.
LiteOS
LiteOS is a real-time operating system (RTOS) from University of Illinois for use in sensor networks.
LiteOS is a real-time operating system (RTOS) from University of Illinois for use in sensor networks.
LSE/OS
The LSE/OS kernel was a research kernel designed by a French research laboratory named Epita System Laboratory.
The LSE/OS kernel was a research kernel designed by a French research laboratory named Epita System Laboratory.
LUnix
LUnix, short for "Little Unix", is a Unix-like operating system designed to run natively on the Commodore 64 and Commodore 128 home computer systems.
LUnix, short for "Little Unix", is a Unix-like operating system designed to run natively on the Commodore 64 and Commodore 128 home computer systems.
MenuetOS
MenuetOS is an operating system with a monolithic preemptive, real-time kernel, including video drivers, all written in FASM assembly language, for 64-bit and 32-bit x86 architecture computers, ...
MenuetOS is an operating system with a monolithic preemptive, real-time kernel, including video drivers, all written in FASM assembly language, for 64-bit and 32-bit x86 architecture computers, ...
MINIX
MINIX is a Unix-like computer operating system based on a microkernel architecture created by Andrew S. Tanenbaum for educational purposes; MINIX also inspired the creation of the Linux kernel.
MINIX is a Unix-like computer operating system based on a microkernel architecture created by Andrew S. Tanenbaum for educational purposes; MINIX also inspired the creation of the Linux kernel.
MINIX 3
MINIX 3 is a project to create a small, highly reliable and functional Unix-like operating system.
MINIX 3 is a project to create a small, highly reliable and functional Unix-like operating system.
Minix-vmd
Minix-vmd is a free software ("open source") operating system which was created from Minix, and added some additional features such as virtual memory and X Window System support.
Minix-vmd is a free software ("open source") operating system which was created from Minix, and added some additional features such as virtual memory and X Window System support.
MiNT
MiNT ("MiNT is Now TOS") is a free software alternative operating system kernel for the Atari ST and its successors.
MiNT ("MiNT is Now TOS") is a free software alternative operating system kernel for the Atari ST and its successors.
MirOS BSD
MirOS BSD is a free operating system, which started as a fork of OpenBSD 3.1 in August 2002.
MirOS BSD is a free operating system, which started as a fork of OpenBSD 3.1 in August 2002.
MonaOS
MonaOS (Microkernel Operating System with Network Suite Architecture) is an operating system written in C++.
MonaOS (Microkernel Operating System with Network Suite Architecture) is an operating system written in C++.
MOSA
MOSA is an effort by two projects, SharpOS and Ensemble OS, both aiming to create a C#-based, FOSS Operating system, to combine their resources.
MOSA is an effort by two projects, SharpOS and Ensemble OS, both aiming to create a C#-based, FOSS Operating system, to combine their resources.
MP/M
MP/M (Multi-Programming Monitor Control Program) was a multi-user version of the CP/M operating system, created by Digital Research developer Tom Rolander in 1979.
MP/M (Multi-Programming Monitor Control Program) was a multi-user version of the CP/M operating system, created by Digital Research developer Tom Rolander in 1979.
MS/8
MS/8 or The RL Monitor System was an operating system developed for the PDP-8 in 1966 by Richard F. Lary.
MS/8 or The RL Monitor System was an operating system developed for the PDP-8 in 1966 by Richard F. Lary.
Nano-RK
Nano-RK is a real-time operating system (RTOS) from Carnegie Mellon University designed to run on micro-controllers for use in sensor networks.
Nano-RK is a real-time operating system (RTOS) from Carnegie Mellon University designed to run on micro-controllers for use in sensor networks.
Native Oberon
Native Oberon or ETHNO, is the version of the Oberon operating system which runs on x86 PC hardware.
Native Oberon or ETHNO, is the version of the Oberon operating system which runs on x86 PC hardware.
Nemesis (operating system)
Nemesis is an operating system designed by the University of Cambridge, the University of Glasgow, the Swedish Institute of Computer Science and Citrix Systems.
Nemesis is an operating system designed by the University of Cambridge, the University of Glasgow, the Swedish Institute of Computer Science and Citrix Systems.
Oberon (operating system)
Oberon is an operating system developed in the late 1980s at ETH Zürich using the Oberon programming language.
Oberon is an operating system developed in the late 1980s at ETH Zürich using the Oberon programming language.
Phoenix-RTOS
The Phoenix-RTOS is an open source Unix-like real-time operating system based on a microkernel, aimed at the embedded systems market.
The Phoenix-RTOS is an open source Unix-like real-time operating system based on a microkernel, aimed at the embedded systems market.
QP (framework)
QP (Quantum Platform) is a family of very lightweight, open-source, state machine frameworks for embedded processors, microcontrollers (MCUs), and DSPs. The QP frameworks enable developing event...
QP (Quantum Platform) is a family of very lightweight, open-source, state machine frameworks for embedded processors, microcontrollers (MCUs), and DSPs. The QP frameworks enable developing event...
ReactOS
ReactOS is an open source computer operating system intended to be binary compatible with application software and device drivers made for Microsoft Windows NT versions 5.x and up.
ReactOS is an open source computer operating system intended to be binary compatible with application software and device drivers made for Microsoft Windows NT versions 5.x and up.
ROS (Robot Operating System)
ROS (Robot Operating System) is a framework for robot software development, providing operating system-like functionality on top of a heterogenous computer cluster.
ROS (Robot Operating System) is a framework for robot software development, providing operating system-like functionality on top of a heterogenous computer cluster.
Sanos
Sanos is a minimalistic 32-bit x86 operating system kernel for network server appliances running on standard PC hardware.
Sanos is a minimalistic 32-bit x86 operating system kernel for network server appliances running on standard PC hardware.
SHARE Operating System
The SHARE Operating System, also known as SOS, was created in 1959 as an improvement on the General Motors GM-NAA I/O operating system, the first operating system, by the SHARE user group.
The SHARE Operating System, also known as SOS, was created in 1959 as an improvement on the General Motors GM-NAA I/O operating system, the first operating system, by the SHARE user group.
SharpOS (operating system)
SharpOS was an open source .NET-C# based operating system that was developed by a group of volunteers and presided over by a team of six project administrators (Mircea-Cristian Racasan, Bruce M...
SharpOS was an open source .NET-C# based operating system that was developed by a group of volunteers and presided over by a team of six project administrators (Mircea-Cristian Racasan, Bruce M...
SimpleLinux
simpleLinux is a GNU/Linux distributions that uses LZMA compression to compress its system files.
simpleLinux is a GNU/Linux distributions that uses LZMA compression to compress its system files.
Soft Hard Real-Time Kernel
S.Ha.R.K. (the acronym stands for Soft Hard Real-time Kernel) is a completely configurable kernel architecture designed for supporting hard, soft, and non real-time applications with interchange...
S.Ha.R.K. (the acronym stands for Soft Hard Real-time Kernel) is a completely configurable kernel architecture designed for supporting hard, soft, and non real-time applications with interchange...
SPIN (operating system)
The SPIN Operating System is a research project implemented in the computer programming language Modula-3, and is an Open Source project.
The SPIN Operating System is a research project implemented in the computer programming language Modula-3, and is an Open Source project.
Syllable Desktop (operating system)
Syllable is a free and open source operating system for Pentium and compatible processors.
Syllable is a free and open source operating system for Pentium and compatible processors.
Tinix
Tinix, standing "Try It as miNIX-like operating system", is a tutorial operating system written by Yu Yuan.
Tinix, standing "Try It as miNIX-like operating system", is a tutorial operating system written by Yu Yuan.
Trix (operating system)
TRIX is a research network-oriented operating system compatible with UNIX version 7.
TRIX is a research network-oriented operating system compatible with UNIX version 7.
VA Kernel
The VA Kernel is a set of programs, developed by the Department of Veterans Affairs of the United States Government, which provide an operating system and MUMPS implementation independent ab...
The VA Kernel is a set of programs, developed by the Department of Veterans Affairs of the United States Government, which provide an operating system and MUMPS implementation independent ab...
Visopsys
Visopsys is an operating system with a default GUI environment for PC-compatible personal computers.
Visopsys is an operating system with a default GUI environment for PC-compatible personal computers.
VSTa
VSTa (Valencia's Simple Tasker) was an operating system with a microkernel architecture, with all device drivers and file systems residing in userspace mode.
VSTa (Valencia's Simple Tasker) was an operating system with a microkernel architecture, with all device drivers and file systems residing in userspace mode.
Whitix
Whitix is a desktop computer operating system written from scratch for the x86 architecture by Matthew Whitworth and others.
Whitix is a desktop computer operating system written from scratch for the x86 architecture by Matthew Whitworth and others.