Wi-Fi Ducky
Upload, save and run keystroke injection payloads with an ESP8266
... remote connection and holding Ducky Script payloads. Although the ESP8266 is awesome, it doesn't have a native USB, which means it can't act as a keyboard. The ESP will open up a Wi-Fi access point and host a web interface from which you can upload and manage your scripts. When you hit run, it will send the script to the ATmega, which then will execute it on the target machine.