ATTiny85 Keyboard

One of the scripts that works on my attiny85 is a keyboard emulator.
All is done  with the next simple script that was available as a sample script in the library;
(   File \ Examples \ DigisparkKeyboard \  Keyboard )

#include "DigiKeyboard.h"

void setup() {
  // don't need to set anything up to use DigiKeyboard
}

void loop() {
  // this is generally not necessary but with some older systems it seems to
  // prevent missing the first character after a delay:
  DigiKeyboard.sendKeyStroke(0);

  // Type out this string letter by letter on the computer (assumes US-style
  // keyboard)
  DigiKeyboard.println("Hello Digispark!");

  // It's better to use DigiKeyboard.delay() over the regular Arduino delay()
  // if doing keyboard stuff because it keeps talking to the computer to make
  // sure the computer knows the keyboard is alive and connected
  DigiKeyboard.delay(5000);
}

After uploading the script the program starts so watch out where to put the cursor when uploading the script.
The Digispark USB reacts if it is a keyboard where the  "Hello Digispark!" is typed over and over again (with a delay  5000 ).

Hello Digispark!
Hello Digispark!
Hello Digispark!
Hello Digispark!

An application could be reading some sensor data on the attiny85 and outputting it e.g. in a spreadsheet.