WiFi Map - A crowdsourced list of routers and passwords
Instabridge - Crowdsourced free wifi (now on Android)
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
TotalHotspots - Total Hotspots helps you find your ideal hotspots.
Wifi Locations - A community driven map for free or not free wifi locations.
Café Wifi - Find a space with some coffee and connectivity to get your work done.