xstate+30State machines, statecharts, and actors for complex logicactor-modelbackground-jobsfinite-state-machinefsm+15
qpc+5QP/C Real-Time Event Framework/RTOS implements event-driven Active Object (Actor) model combined with Hierarchical State Machines. Specifically designed for embedded systems (e.g., ARM Cortex-M MCUs).active-objectactoractor-modelarm+16