Instabridge - Crowdsourced free wifi (now on Android)
TotalHotspots - Total Hotspots helps you find your ideal hotspots.
WiFi Map - A crowdsourced list of routers and passwords
Café Wifi Search 🔍 - Find great cafés to work from, worldwide.
OpenSignal - Mobile analytics and insights on wireless connectivity from Opensignal, the independent global standard for understanding the true state of the world's mobile network.
Wiman - Browse over 70 million free mobile WiFi hotspots