Keyestudio ESP8266 WI-FI Module Shield +1M Micro USB Cable For Arduino (Chip is CP2102-GMR)
ESP8266 WiFi Shield - RobotShop
ESP8266 Wifi Bee (Arduino Compatible) - DFRobot
Esp8266 Esp-12 Esp-12e Uart Wifi Wireless Shield Development Board For Arduino Mega R3 Module Mega 3.3v 5v Ttl Interface One - Integrated Circuits - AliExpress
NodeMCU ESP8266 programming shield for DIY projects and prototyping | eBay
Arduino UNO + ESP8266 ESP-12E UART WIFI Shield | by Attila Varga | Medium
NodeMCU Motor Drive L293D Shield, WifiCar – ElectroDragon