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ReactOS

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  Analyzed 2 days ago

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 complete and equivalent public interface.

12.6M lines of code

89 current contributors

4 days since last commit

52 users on Open Hub

Very High Activity
4.61538
   
4 Reviews
I Use This
Mostly written in C
Licenses: GPL2
Tags desktop_environment i386 intel kernel microsoft operating-system operating_system operatingsystem operating_system_kernels operating-systems operating_systems operatingsystems 8 more...

illumos

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  Analyzed 1 day ago

A community derivative of the OS/Net consolidation from OpenSolaris.

11.3M lines of code

76 current contributors

28 days since last commit

22 users on Open Hub

Moderate Activity
5.0
 
0 Reviews
I Use This
Mostly written in C
Licenses: BSD-3-Clause, common_de...
Tags amd64 distro dtrace filesystem i386 ia32 kernel multithreaded networking nfs opensolaris operating-system 14 more...

HelenOS

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  Analyzed 1 day ago

HelenOS is a microkernel-based multiserver operating system designed from scratch. It decomposes key operating system functionality into many isolated, intensively communicating server processes that reside entirely in user space. HelenOS thus provides a computing environment that has several ... [More] virtues, such as flexibility, increased robustness, well defined explicit interfaces and reduced complexity of individual components as compared to other operating systems. HelenOS runs on seven different processor architectures, ranging from a 32-bit uniprocessor little-endian ARMv4 to a 64-bit multicore big-endian UltraSPARC T1. [Less]

27.4K lines of code

15 current contributors

almost 3 years since last commit

17 users on Open Hub

Inactive
4.75
   
0 Reviews
I Use This
Mostly written in shell script
Licenses: BSD-3-Clause
Tags amd64 arm cli filesystem gui ia32 ia64 kernel microkernel mips multiserver networking 8 more...

AROS

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  Analyzed about 16 hours ago

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] improving on it in many areas. The source code is available under an open source license, which allows anyone to freely improve upon it. [Less]

6.37M lines of code

18 current contributors

20 days since last commit

16 users on Open Hub

Moderate Activity
5.0
 
0 Reviews
I Use This
Mostly written in C
Licenses: AROS_Publ...
Tags amd64 amiga amigaos aros desktop desktop_environment distro kernel m68k operating operating_system operating_system_kernels 9 more...

Kolibri OS

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  Analyzed almost 4 years ago

KolibriOS is an open source operating system with a monolithic preemptive, real-time kernel, video drivers, for 32-bit x86 architecture computers, developed and maintained by The KolibriOS Project Team. KolibriOS is a fork of MenuetOS, written entirely in assembly language.

790K lines of code

15 current contributors

almost 4 years since last commit

15 users on Open Hub

Activity Not Available
5.0
 
0 Reviews
I Use This
Mostly written in Assembly
Licenses: gpl
Tags 32bit asm assembly desktop fasm fast floppy gpl gplv2 gui i386 i586 8 more...

GNU Hurd

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Claimed by GNU Analyzed about 1 year ago

The GNU Hurd is the GNU project's replacement for the Unix kernel. The Hurd is a collection of servers that run on the Mach microkernel to implement file systems, network protocols, file access control, and other features that are implemented by the Unix kernel or similar kernels (such as Linux).

2.28M lines of code

16 current contributors

about 1 year since last commit

14 users on Open Hub

Activity Not Available
4.3
   
0 Reviews
I Use This
Mostly written in C
Licenses: gpl
Tags gnumach hurd ia32 microkernel multiserver operating_system_kernels posix symmetric_multi_processing x86

Nexenta

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  Analyzed almost 4 years ago

Nexenta Operating System is a free and open source operating system combining the OpenSolaris kernel with GNU application userland. Nexenta Operating System runs on Intel/AMD 32/64bit hardware and is distributed as a single installable CD. Upgrades and binary packages not included on the CD can be ... [More] installed from NexentaOS repository using Advanced Packaging Tool. In addition, source based software components can be downloaded from network repositories available at Debian/GNU Linux and Ubuntu Linux. [Less]

17.7K lines of code

0 current contributors

over 12 years since last commit

14 users on Open Hub

Activity Not Available
4.28571
   
0 Reviews
I Use This
Mostly written in shell script
Licenses: common_de..., gpl
Tags amd64 containers debian distro dtrace filesystem gnu i386 ia32 iscsi kernel multithreaded 22 more...

MINIX 3

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  Analyzed about 11 hours ago

MINIX 3 is a new open-source operating system designed to be highly reliable, flexible, and secure. It is loosely based somewhat on previous versions of MINIX, but is fundamentally different in many key ways. MINIX 1 and 2 were intended as teaching tools; MINIX 3 adds the new goal of being usable as ... [More] a serious system on resource-limited and embedded computers and for applications requiring high reliability. This new OS is extremely small, with the part that runs in kernel mode under 4000 lines of executable code. The parts that run in user mode are divided into small modules, well insulated from one another. For example, each device driver runs as a separate user-mode process so a bug in a driver (by far the biggest source of bugs in any OS), cannot bring down the entire OS. [Less]

7.48M lines of code

3 current contributors

almost 5 years since last commit

14 users on Open Hub

Inactive
4.33333
   
0 Reviews
I Use This
Mostly written in C
Licenses: BSD-3-Clause
Tags ash education microkernel operating_system_kernels

Syllable operating system family

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  Analyzed almost 4 years ago

Syllable is a fork of AtheOS. The goal of Syllable is to create a reliable and easy-to-use open source operating system for the home and small office user.

2.7M lines of code

0 current contributors

over 10 years since last commit

13 users on Open Hub

Activity Not Available
3.75
   
0 Reviews
I Use This
Mostly written in C
Licenses: BSD-3-Clause
Tags alternative desktop_environment distro download freesoftware gui linux news operating operatingsystem operating_system_kernels operating-systems 5 more...

SmartOS

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  Analyzed 2 days ago

SmartOS: The Complete Modern Operating System SmartOS incorporates the four most revolutionary OS technologies of the past decade — Zones, ZFS, DTrace and KVM — into a single operating system, providing an arbitrarily observable, highly multi-tenant environment built on a reliable ... [More] , enterprise-grade storage stack. With the introduction of KVM in SmartOS, you no longer have to give up the power of an enterprise-grade operating system in order to run legacy applications and stacks. SmartOS turns any server into a highly efficient hosting platform for multi-tenant, machine-to-machine, or storage applications. SmartOS offers unique, innovative tools for application developers, service providers and data center operators – tuned and hardened for modern datacenter deployment. [Less]

262K lines of code

24 current contributors

12 days since last commit

12 users on Open Hub

Very Low Activity
4.66667
   
0 Reviews
I Use This
Mostly written in JavaScript
Licenses: No declared licenses
Tags amd64 containers distro dtrace filesystem i386 ia32 illumos kernel kvm multithreaded networking 17 more...