Over 11,000 people participated in the first annual National Day of Civic Hacking on June 1st and 2nd, 2013. At the event, developers collaborated with government agencies and entrepreneurs to create applications that help solve civic and social problems impacting local communities. Developers used a variety of public APIs and datasets to create their applications, including the US Census Bureau API, which was used to create an interactive application and several infographics. The US Census Bureau API is the first API created by the US Census Bureau and was released to the public back in July 2012.
Involver launched its Engagement Optimization API last week (read the official release here). Partners are utilizing the API to "optimize their ad spend on social in the way they've been doing across the web for a long time." Although advertising across social networks has been deployed for quite some time, advertisers have had limited tools to track engagement. Facebook Insights is probably most commonly used to analyze social data. When users have required deeper analysis, the advertisers were forced to use highly custom integrations.