Contiki is an open source operating system for the Internet of Things. The IoT is a collection of technologies that make it possible to connect things like sensors and actuators to the Internet, thereby allowing the physical world to be accessed through the web.
Contiki – IoT Operating System
The open source operating system for the Internet of Things
Contiki allows tiny, battery-operated low-power systems communicate with the Internet. Contiki provides powerful low-power Internet communication. Contiki supports fully standard IPv6 and IPv4, along with the recent low-power wireless standards: 6lowpan, RPL, CoAP. With Contiki’s ContikiMAC and sleepy routers, even wireless routers can be battery-operated.
Contiki Community: http://www.contiki-os.org/community.html
Contiki is used in a wide variety of systems such as city sound monitoring, street lights, networked electrical power meters, industrial monitoring, radiation monitoring, construction site monitoring, alarm systems, and remote house monitoring.