Here's a smattering of example apps built off this kind of data (e.g., data in Socrata-powered open data portals like this one): http://www.socrata.com/civic-ap

Here's a smattering of example apps built off this kind of data (e.g., data in Socrata-powered open data portals like this one): http://www.socrata.com/civic-apps/ http://www.socrata.com/civic-apps/ (Disclosure?: I'm friendly with the Socrata folks)