Congratulations to Wikipedia and the Wikimedia Foundation:
Previous versions of our application used Google Maps for the nearby view. This has now been replaced with OpenStreetMap – an open and free source of Map Data that has been referred to as ‘Wikipedia for Maps.’ This closely aligns with our goal of making knowledge available in a free and open manner to everyone. This also means we no longer have to use proprietary Google APIs in our code, which helps it run on the millions of cheap Android handsets that are purely open source and do not have the proprietary Google applications.
OpenStreetMap is used in both iOS and Android, thanks to the amazing Leaflet.js library. We are currently using Mapquest’s map tiles for our application, but plan on switching to our own tile servers in the near future.
Foursquare and Apple have also recently ditched Google Maps in favor of OpenStreetMap.