SmartThings is a connected, open hardware platform for the Internet of Things, most specifically home automation. SmartThings was acquired by Samsung in August of 2014.
Our developer portal: http://developer.smartthings.com/ Getting Started Guide: http://docs.smartthings.com/en/latest/getting-started/up-and-running.html
If you have any questions, our community site is a great resource: http://community.smartthings.com