Boots into many systems and GRUB2 ones!
Market leading real time kernel for 40+ microcontroller architectures
Real-Time Event Frameworks based on active objects & state machines
AO RTOS is small real time OS based on Active Object concurrency model
freeRTOS for Arduino Uno, Goldilocks 1284p & Mega 2560
Vampire OS is the alternative to Windows and macOS
C++ embedded RTOS,TCP/IP,TLS,FAT,USB,PERIPHERALS,...
An operating system for those who value security and privacy.
RTOS for Secure, Safe and Real-Time Systems
Open-source RTOS and Embedded Systems Toolkit for C++ and C
Run Linux on Windows or other OSes, natively.
Small real time operating system for AVR and ARM microcontrollers
CMAKE build enviroment for LPC2000 and LPC17xx Cortex MCUs
Neptune is a kernel and operating system for x86 PCs.