WiFi Map - A crowdsourced list of routers and passwords
Eventjoy - The Easiest Way To Organize An Event
Instabridge - Crowdsourced free wifi (now on Android)
Pogoseat - Pioneers of the in-event seat upgrade technology and Text-to-Buy mobile ticketing soltutions.
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
TechEvents.co - Tech and startup events aggregator