In collaboration with others in the Pirate Party of Iceland, I created Safety Valve. Safety Valve is a platform that allows the residents of Iceland to act as a shadow parliament of sorts. Each bill currently moving through Icelandic parliament is converted into a petition. Residents can then digitally sign for or against each petition using their Ice Key, a digital authentication mechanism provided by the Icelandic government. We ran it for a couple years but it is unfortunately no longer online.
All of the code is hosted on Github