Cluster wide IPC providing datagram, connection, and bus messaging
A microkernel-based multiserver operating system written from scratch.
An little operating system
Free cooperative operating system designed for microcontrollers
Free real-time operating system designed for microcontrollers
Message passing microkernel-based Operating System for ZX Spectrum +3e
Small real time operating system for AVR and ARM microcontrollers
Firmware source code for MosChip's MCS8140 USB/IP network processor