Here's a simple online Tarot page I wrote a few years back. Very simple: choose a spread, you see the cards face-down, click on each card in turn to flip it face-up. You're on your own for interpretation. I'm taking the opportunity of the transition to the new site code, to add a Project Wonderful box - but if I'm not pleased by the bidding on that, I may remove it.
The card images used in this system are scans from the edition of the Waite deck published in 1909 that collectors call "Pamela-A," and they are public domain in Berne Convention countries. See John B. Hare's comparison of the Pamela-A deck with another popular deck.