There are two types of plugins at Keyboard Extension: Built-in and Autohotkey.
Built-in plugins are methods integrated into the code of executable file keyboardextension.exe. Though such plugins can not be separated from the executable file, they can be disabled. This can be useful if you are the business owner and you would like to restrict certain functionality to your employees.
Autohotkey plugins are open source scripts written in Autohotkey language (more info about Autohotkey: https://www.autohotkey.com/). Any authorized user can create an Autohotkey plugin by uploading the Autohotkey script and setting up incoming and outgoing parameters.