The Perfect RTOS for Creators

Makers, educators, and hobbyists can use our
commercial real-time operating system for free. Your project deserves Micrium's unparalleled reliability, performance and dependability.

Makers & Creators

A Maker License allows hobbyists to embed µC/OS into their projects. Contact us for specifics about eligibility.

Partners & Design Houses

A Partner License allows Micrium Certified Partners to embed µC/OS into proof of concepts and demos for no cost.


An Education License allows accredited institutions to use µC/OS for class projects, and use Micrium's books in your curriculum.

Real-Time Kernel


Micrium’s µC/OS-III is a highly portable, scalable, preemptive, real-time, deterministic, multitasking kernel for microprocessors, microcontrollers and DSPs.

Learn more about Micrium’s real-time kernel

Communication Software

TCP/IP Networking

A compact, reliable, high-performance TCP/IP protocol stack. Features dual IPv4 and IPv6 support.

Learn more about TCP/IP support

USB Host and USB Device

Real-time USB Host and Device software stacks designed for embedded systems equipped with a USB Host or OTG controller.

Learn more about USB support

File System

A compact, reliable, high-performance and thread-safe embedded file system for CPUs, MCUs, and DSPs.

Learn more about Micrium's file system


An industrial communications protocol used for connecting industrial electronic devices.

Learn more about Modbus support

License Types

License Type Hobbyists Partners & Design Houses Educational Institutions Commercial
Who Qualifies Private home use Micrium Certified Partners Students and educators at accredited institutions For-profit businesses
Cost $0 and rights to name as customer $0 for proof of concepts, or contributing ports and drivers $0 License cost varies by type; royalty-free
TCP/IP Module
USB-Device Module
USB Host Module
Modbus Module
File System
CAN Module
Graphical UI
Building Blocks
Free Training Seminars Space permitting
Training Materials
One-Year Maintenance

Ported to a Large Number Architectures

µC/OS is Available for Your Platform

For a complete list of current architectures supported, visit the Micrium Download Center.
And if you don't see what you need, contact us.

Sign Up for µC/OS for Makers