This document contains a series of tweets by Jason Hibbets at a conference discussing opening cities through open source. It promotes open source as enabling transparency, collaboration, participation and rapid prototyping in government. It provides examples of open data, citizen engagement and civic hacking initiatives in Raleigh like Code for America brigades and DataJams. These helped establish open policies and online services at the city like Open Raleigh, My Raleigh Ideas and an open data portal. The document advocates that combining open source, open government and civic participation can make cities more innovative, accountable and engaged.