Location History Visualizer - Visualize Google location history data on a heatmap 🗺️
WiFi Map - A crowdsourced list of routers and passwords
Mapstr - Your places, your world!
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
Mapiful - Create & order custom printed maps of your favorite places
Instabridge - Crowdsourced free wifi (now on Android)