WiFi Map - A crowdsourced list of routers and passwords
Hotel Wifi Test - Choose your hotel by the quality of their WiFi
Instabridge - Crowdsourced free wifi (now on Android)
FLIO - The global airport app - Free wifi access, discounts & tips
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
Wi-Fi Widget - See, test, and share your wifi without unlocking your iPhone