FemtoLinux is a new Linux flavor optimized for real-time embedded systems. With FemtoLinux, critical Linux applications run in kernel mode. This results a low system call and interrupt-to-application latency and overhead. FemtoLinux also simplifies RTOS-to-Linux porting significantly — RTOS applications can be ported to embedded Linux without drastic changes to the software architecture. FemtoLinux is available now for the ARM architecture. MIPS and PowerPC ports are in the works.