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ChibiOS/RT is a free and efficient RTOS designed for deeply embedded applications. It offers a comprehensive set of kernel primitives and supports many architectures: ARM7, Cortex-M0, Cortex-M3, Cortex-M4, PowerPC e200z, STM8, AVR, MSP430, ColdFire, H8S, x86.
A microkernel-based multiserver operating system written from scratch.
HelenOS is a portable microkernel-based multiserver operating system written from scratch. It decomposes key operating system functionality such as file systems, networking, device drivers and graphical user interface into a collection of fine-grained user space components that interact with each other via message passing. A failure or crash of one component does not directly harm others. HelenOS is therefore flexible, modular, extensible, fault tolerant and easy to understand.
HelenOS...
C++ embedded RTOS,TCP/IP,TLS,FAT,USB,PERIPHERALS,...
Aim of embKernel is to produce an unified C++ source for embedded devices (cortex-M uC for the time being) which includes:
-RTOS
-TCP/IP stack
-TLS (Work in progress)
-FAT32 file system
-USB stack
-Drivers for common uControllers peripherals
See the wiki pages for more information.
NS2 Linux is dedicated to improve the Network Simulator (NS-2) to match Linux performance. Planned contents include: an NS-2 module that runs Linux congestion control functions, tutorials on how to run NS-2 to match Linux performance, benchmark for TCP.