NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
Get Free Fucking WiFi - Find the best fucking WiFi just around the corner.
Vistumbler - Vistumbler is a wireless network scanner for Windows Vista and Windows 7. Features:
Instabridge - Crowdsourced free wifi (now on Android)
Wifi Analyzer - Wifi Analyzer is a handy tool which helps you to select a better channel for your wireless router.
Café Wifi Search 🔍 - Find great cafés to work from, worldwide.