Well it was nice to hear jctm's explanation of stud strategy and memorization tricks..... but here is the answer to the question you were actually asking.
Online 7-Card Stud Inspector - Perfect Memory for Online 7-Card Stud Poker, Instant Stud Odds
For the record I neither sell nor profit from this software. I do however; recommend it. Make sure its compatible with the site you want to play on before purchasing.