Extravaganza - Airbnb for live entertainment!
WiFi Map - A crowdsourced list of routers and passwords
Seatify - Reserve a seat at cafe & office from people there
Instabridge - Crowdsourced free wifi (now on Android)
Guestlist - Market events online, accepting registrations & ticket sales
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.