Arduino core for ATtiny 1634, 828, x313, x4, x41, x5, x61, x7 and x8
Checking Out the New Atmel ATtiny102/104
heise: ATtiny: Winzlinge ganz groß
attiny2313 und V-USB
Programming the ATtiny85 From Raspberry Pi
ATTiny2313 mit Arduino ISP programmieren
ATtiny2313: AVR ATtiny USB Tutorial
AVR ATtiny USB Tutorial Part 1
AVR ATtiny USB Tutorial Part 2
AVR ATtiny USB Tutorial Part 3
AVR ATtiny USB Tutorial Part 4