Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
WiFi Map - A crowdsourced list of routers and passwords
Zenly - Zenly is a GPS tracker to locate your friends in realtime.
Instabridge - Crowdsourced free wifi (now on Android)
OwnTracks - Cross-platform location sharing
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.