Hackathons and app competitions are held to encourage the use of open data. Hackathons involve data and problem pitching, coding, and showcasing prototypes. App competitions announce available data, hold a hackathon for developers to build apps, and provide rewards for submissions. Recent events included a transport data hackathon with 24 apps and a geo-data hackathon with 65 hackers and 24 apps. Future plans include an open data bazaar, hackathon, and weekend with workshops, coding, and an evening program to engage more people with open data. Questions are raised about sustainability and scalability, and how to best engage civic hackers while transforming government.