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A toy operating system built in C++ and x86 assembly.2 weekly downloads
An OS Kernel, with native support of network applications.
A desktop operating system project to help one getting things done.
The Apollo Project is an early Pre-Alpha of a Kernel experiment run by Primis Computers.
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
The SuperWikia ED-C2 is a backend manager for the SuperWikia LME launch environments application. It is used to manage and host all LME plugins, extension and macros and supports multi-programming and multi-language (I-18n) capabilities.
RODOS is a real-time embedded operating system, designed for applications demanding high dependability. The system was developed in C++, using an object-oriented framework simple enough to be understood and applied in several application domains.3 weekly downloads
Nevux is an object-orientated non-preemptive operating system for micro-controllers written in C++. It is separated in portable and device specific code.
Wobba Wobba is an open source graphics SDK designed for high-end photo-realistic visualization code compiling and interpreting. Used with Muhha!, Wobba Wobba builds upon the existing IDE 3D capabilities and expansive extension libraries.
Gebix is a FreeBSD-based operating system that will be available for both x86 and ARM as of version 0.7 Release Candidate 1. It will sacrifice most of the legacy support to transition to new or recent alternatives.1 weekly downloads
NandOS ist ein Betriebsystem.1 weekly downloads
I'd wanted to plan 3 OSes. Hobby is most flexible. So THAT. with linux, WinME+ and darwin methods. 1st efforts- newer, usb, sata+, 64bit-multicore cpus. . At most, 64-bit, 32-bit compat graphical safe-mode command-line... Primarily. a KERNEL
Beamology: Semicom Project Management
x64 OS written in C++ with a C++ API
Plex OS is an open source IA32 operating system
An operating system based upon the MOSA kernel.1 weekly downloads
UEFI GTP fdisk is a disk partitionning tool running under UEFI/BIOS45 weekly downloads
A Debug style tool for OS Free systems1 weekly downloads
A port of the Linux operating system kernel and assorted userspace to the Nintendo Wii.
Fortress OS is an open source modern multitasking operating system. Intel IA-32 386 compatibility. Fortress is clean implemented from scratch. Fortress is still in early stage ( current state at the end of plan 2 ) and needs huge work.1 weekly downloads
Open source linux based firmware for the Lego Mindstorms NXT.
ArchOpen is a project aimed at providing a fast, light and free operating system and applications for portable multimedia devices based on TI DM&DSC chips. It currently supports a lot of Archos multimedia devices (Gmini402,AV400,...).
FreeDOS-64 is 64-bit Disk Operating System under development for the AMD64 platform.