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.
Arduino Wireless Projects and Shields
Very Cheap/Simple WiFi Shield for Arduino and Microprocessors : 6 Steps (with Pictures) - Instructables
ESP8266 WiFi Shield for Arduino - RobotShop
Arduino ESP8266 'Shiald', step by step – ELFquake
Getting Started with Arduino WiFi Shield 101
CC3000 WiFi Shield for Arduino R3 with SD card support MEGA2560-OKY2222-1 – OKYSTAR
Official DOIT Serial WiFi Shield for Arduino UNO R3 2560 from ESP8266 WiFi Web Sever Shield ESP-13 IoT DIY Development Board Kit - AliExpress
Arduino UNO + ESP8266 ESP-12E UART WIFI Shield, by Attila Varga
Arduino WiFi Shield
Arduino WiFi Shield with Integrated Antenna A000058 – Techonics LTD
Arduino WiFi Shield Arduino Documentation