Contiki is an open source operating system for the Internet of Things. Contiki connects tiny low-cost, low-power microcontrollers to the Internet. Contiki supports fully standard
IPv6 and IPv4, along with the recent low-power wireless standards: 6lowpan, RPL, CoAP. Contiki applications are written in standard C, with the Cooja simulator Contiki
networks can be emulated before burned into hardware. Contiki is developed by a world-wide team of developers with contributions from Atmel, Cisco, ETH, Redwire LLC, SAP, Thingsquare,
and many others, led by Adam Dunkels of Thingsquare.