A real time OS based on uITRON 4.0 full specification. You can use dynamic objects and easy to use. This is suitable for 16bit-CPU, even. First target is H8/300H (AKIZUKI AE-H8/3069-LAN). About the ITRON specification: http://www.assoc.tron.org
Crosos is a SubLinux Distribution
Crosos is a open-source OS. It is based on the Linux Kernel and mostly uses the same code in Ubuntu (but it has been derived from Debian)
Danja Operating System
The Danja OS is part of the Danja project. It is operating system for x86, GBA, I/CP and Atmega16/32/644 computers. Checkout the Documentation/Wiki for details.
FreeMiNT is a free alternative OS kernel for Atari systems & clones
FreeMiNT provides the basis of a free TOS compatible replacement OS that can multitask. Used together with the free system components fVDI (device drivers), XaAES (graphical user interface widgets), and TeraDesk (desktop manager), it provides a modern user interface.
Written entirely in 8051 assembly this is a bare bones Real Time OS (RTOS) kernel for the P89C668 microcontroller. The OS itself is inspired by the discussion in 'MicroC/OS-II: The Real-Time Kernel' an excellent book by Jean J. Labrosse.
x64 OS written in C++ with a C++ API
x64 OS written in C++ with a C++ API.
The sole purpose of this operating system is to do programming for multiple systems. It runs solely by itself, which makes it great for creating operating systems such as this one.
Simple, Fast, Advanced... ZintoriOS. Made in Wellington, New Zealand
Android tools for MediaTEK MT53XX Serial Chips