iBurn is an offline map and guide for the Burning Man art festival. For the 2014 release we rewrote it from scratch for iOS 7 on top of some really awesome open source software. We decided to use YapDatabase+Mantle instead of Core Data, and Mapbox instead of MapKit for our offline map tiles. For users of Android devices, David Brodsky developed a version of iBurn for Android.
Just don’t get playa dust in your electronics!