Glympse - Glympse is the easy way to safely share your location in realtime. No sign-up needed.
Instabridge - Crowdsourced free wifi (now on Android)
Mapple.me - Mapple.me bridges the gap between available time and availability of friends to increase social...
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
OwnTracks - Cross-platform location sharing
WifiMapper - Find free WiFi anywhere in the world