This week Rwinscot shared his RickPAW ATtiny85 programming shield project in the forum:
Saw a couple implementations of the ATtiny85 programmer on Instructables… and decided to roll my own.
It’s bare-bones, but gets the job done. It works as a minimal Arduino shield and has headers for ‘jacking-in’ to the uC. Goals on this one are to keep the design inexpensive and experiment with different board shapes.
Nice design. Maybe mine is not as fancy as the programmer shown above, but a bit more versatile…
http://www.kaibader.de/attiny-isp-arduino-shield/
Kai