Contiki IoT OS came to scene in the early 2000's in the form of a thesis project by a Swedish graduate student who wanted real-time tracking of players' vitals during hockey games that could then be displayed to the crowd. He wanted to accomplish this by outfitting the players with a series of sensors and accelormeters connected to a common computer network. The main issue that was initially faced, which became the cornerstone of Contiki, was the challenge of creating a lightweight internet protocol or OS that used a small amount of memory and battery usage. Fast forward a few years and hundreds of hours of community driven open source help, Contiki OS was released to the public in 2003.
Now, Conitki OS is designed to run on small systems that require low maintance. A match made in heaven for us at Zolertia. With our hardware you can use contiki to run projects in the industrial sector or smart cities alike. And with an active community of contributors and our wikipage https://github.com/Zolertia/contiki you won't be hardpressed to find solutions to your problems.
Overall, the open source community of Contiki OS allows for frequent updates in security issues as they come up and its IPv6 stack allows for battery supported devices that do not require electrical power source.
Visit Contiki homepage here: http://www.contiki-os.org/