The good people at OpenCityApps build 2nd City Zoning to provide a simple way for stakeholders to view zoning regulations in their area or citywide. As always, they kept the code open source so that others could benefit, and possibly redeploy the app in different cities.
Recently, Chris forked the project for NYC to create http://gothamzoning.org . At this hacknight, he'll explain the process of forking and modifying the app, what tools and technologies were used, and how he was able to stand up a fully-featured zoning app in just a few days of part-time coding.