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.