USB Rubber Ducky(By HAK5) like device using Arduino Leonardo(32u4).
USB Rubber Ducky is device Devoloped by HAK5, which look like a pendrive, which when plugged into a computer, computer recognizes it as a keyboard.
It is a cheaper version of Rubber Ducky and can be made by anyone, if you have a little time to setup device on your own. It uses Keyboard library of Arduino and coding it is as simple as coding for any other Arduino based project.