Designed for single-chip micro controllers with limited RAM and ROM, SALVO provides the power, speed and flexibility of an RTOS in low-cost embedded designs. Targets: 8051 Family ARClite microRISC ARM ARM7TDMI Atmel AVR and MegaAVR Motorola/Freescale M68HC11 TI's MSP430 and more Call for more information 

The Fusion RTOS is a priority-based, preemptive, multitasking, real-time operating system designed and optimized for high performance DSPs and media-centric microprocessors. Already considered one of the world’s smallest, most highly optimized real-time 

CMX-RTX is a truly preemptive, multi-tasking RTOS offering one of the smallest footprints, fastest context switching, and lowest interrupt latency times available on the market today. RTOS functionality provided in CMX-RTX includes: task, message, queue, system, event, memory, resource, semaphore, and timer management. CMX-RTX includes RTOS Configuration Manager, which simplifies RTOS configuration. The CMXKAware option provides the ability to view applications running under the RTOS via In-Circuit Emulators, Simulators or ROM Monitors and to view kernel objects including tasks, mailboxes and cyclic timers.