MalDuino — Open Source BadUSB

https://www.indiegogo.com/projects/malduino-badusb-arduino-usb#/

“MalDuino is an arduino-powered USB device which has keyboard injection capabilities. Once plugged in, MalDuino acts as a keyboard, typing commands at superhuman speeds. What’s the point? You could gain a reverse shell, change the desktop wallpaper, anything is possible. For penetration testers, hobbyists and pranksters the MalDuino will serve you well!”

MalDuino — Open Source BadUSB