1. OpenWiFiSpots (www.openwifispots.com)
  2. WiFi Free Spot (www.wififreespot.com)
  3. Boingo (www.boingo.com)
  4. Flexiroam (www.flexiroam.com)
  5. WiFi Map (www.wifimap.io)
  6. Wiman (wiman.me)

 

References:

Wikipedia.com

www.lonelyplanet.com

 

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