Super Mario Kart and Sunset Riders.
I recommend also picking up one of those SNES screwdriver bits and some cleaning solution. I've managed to get a lot of "broken" carts back to full working condition by opening them up and thoroughly wiping the grime off the connectors.
Also, I would assume the built in batteries would be dead by now for all the carts that use battery backup, so that's something to keep in mind as well. Never done it personally but I believe replacing the batteries requires soldering.