Code for America maintains a map of their open-data volunteer groups (called brigades): http://www.codeforamerica.org/brigade/ http://www.codeforamerica.org/bri

Code for America maintains a map of their open-data volunteer groups (called brigades): http://www.codeforamerica.org/brigade/ http://www.codeforamerica.org/brigade/ Open Knowledge Foundation has a census tool that links out to lots of open data, their data isn't comprehensive though as it relies on crowd-sourced reporting and has specific slots they're looking for: http://us-city.census.okfn.org/ http://us-city.census.okfn.org/