WiFi Shield for Arduino
Tinysine WIFI shield based on Roving Networks RN-XV module. It can be separate two parts – Tinysine Bee shield and WiFiBee module. It provides the bridging from TTL serial port communication to IEEE802.11b/g/n wireless communication.
Getting Started with the Arduino WiFi Shield
Wifi Shield
WiFi Shield For Arduino (802.11 b/g/n)
Overview, Adafruit WINC1500 WiFi Shield for Arduino
PHPoC WiFi Shield for Arduino
ESP8266 ESP-12E UART Wireless WIFI Shield TTL Converter Uncomplicated : 5 Steps - Instructables
WiFi Shield - Elecrow
File:WiFi Shield for Arduino.jpg - Wikimedia Commons
Arduino has discontinued this shield, please check out the Adafruit WINC1500 shield for a nearly-identical replacement with the same exact module, and
Arduino WiFi Shield 101
WiFi Shield For Arduino (802.11 b/g/n)
Wifi Shield V2.0 Seeed Studio Wiki