The Arduino ICSP Programmer allows you to create your very own Arduino board, simply connect the programmer to your Arduino compatible board and start uploading your boot loader or sketch.

This fully compatible alternative to the Arduino bootloader requires an AVR ISP programmer to burn it to the chip on your Arduino.

The tutorial is fairly straightforward, and even demonstrates how the Arduino can be used as an ISP for the ATtiny, removing the need to purchase a standalone programmer.