Download the arduino IDE: https://www.arduino.cc/en/Main/Software
Get the drivers: https://github.com/digistump/DigistumpArduino/releases
Additional Board Manager URL: https://raw.githubusercontent.com/digistump/arduino-boards-index/master/package_digistump_index.json
DigiKeyboard Source Code: https://github.com/digistump/DigisparkArduinoIntegration/blob/master/libraries/DigisparkKeyboard/DigiKeyboard.h
Tools/board/digispark default 16.mhz File examples, digispark keyboard/keyboard Tools/programmer, usbtinyUSP