Ivmuk-OS is small RTOS for microcontrollers with low resources. Microchip's PIC16F877A MCU uses about 70 bytes of RAM and 800 bytes Flash. Memory usage depends on number of tasks and messages defined. This should create competition to Salvo OS some day.
Provide secure and stable OS, based on highly modified Linux Kernel, own package system, like "BSD Ports". Compatible with x86, Power PC. Easy to use of any level users. Complete Documentantion in many languages. 99% compatible with Windows.