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