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ELKS is a subset of the Linux kernel that runs on IBM compatible PCs from 8086 up. It is intended to get use out of obsolete old hardware, for use in embedded systems, and as an educational tool. ELKS has been moved to Github to protest SourceForge's installer adware hijacking. This does not directly affect ELKS, but it does affect many major open source projects such as Gimp and FileZilla by attempting to trick the user into installing adware in order to download these programs. I refuse to leave ELKS here with such policies in effect. If you have questions about this, please email email@example.com weekly downloads
Embedded Operating System3 weekly downloads
C-BIOS is an open source BIOS for MSX computers. C-BIOS can be shipped with MSX emulators so they are usable out-of-the-box. This project aims to improve C-BIOS by fixing incompatibilities with the MSX BIOS and the development of a Disk ROM.14 weekly downloads
An Instructional Operating System for the x86 Architecture1 weekly downloads
Cerberus is an attempt at creating flexible and extremely customizable Operating System that can be used on many types of computer systems including desktops, servers, and embedded solutions.
A Linux Proaudio FrameWork with improved Wine/kernel(rt) support3 weekly downloads
A universal 64-bit Operating Environment for Multi-Processor Machines.
OzzyOs is an open source operating system for home automation servers.
Nieoficjalna wersja jądra, ma dać pełne wsparcie sprzętowe dla większości modeli netbooków z procesorem Intel Atom, w tym zewnętrznych sterowników i oprogramowania.5 weekly downloads
3D-Game with large geodic Maps (Globes) - include multiple Game-Genres11 weekly downloads
Customize Kernel 64-Bit Operating System
This was a personal research project for me. I never made any later commits, so most of the code is on unreadable floppy disks. I might tinker with the idea of a toy operating system someday.
An operating system aiming towards distribution by being a low level VM for object-oriented languages featuring introspection. Pending rewrite to meet new goals. The old kernel is available in SVN for reference.
Pebble is a 32-bit operating sytem for IA-32 systems. It can run MS-DOS and DPMI compatible applications and will provide advanced features such as multitasking and paging. It will be a good platform to run old MS-DOS and embedded programs.
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 use9 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.2 weekly downloads
Hobbyist operating system using a new microkernel. The objective is to not get bogged down by ancient legacy processor support. The OS is meant to be designed from the ground up, without utilizing any legacy or existing implementations or designs.
open source analogue of IBM OS/2 operating system
Turtle OS is an Unix-like OS. It aims to be open source, secure, high performing and portable.
An experimental kernel patchset against the 2.6 kernel tree.1 weekly downloads
The Portable Operating System is meant to be an all purpose operating system that can suit many needs. Project goals include compatibility with other Unix-like operating systems and complete binary compatibility with Linux.
Popcorn is a new 32-bit operating system kernel for x86-based computers. It currently features super-fast speed (no bloatware) and small size.1 weekly downloads
Haiku is an open-source operating system currently in development designed from the ground up for desktop computing.153 weekly downloads
MightyOS is a serious attempt at making a fast and lightweight Operating System written in C++.
The Harmony project has two fundamental guidelines: Make it easy and make it flexible. It is an entirely new operating system that focuses on giving the user a totally customizable experience.