I think that app is called Card Star
Yeah Card Star it is.
A couple others I have is Nike+ for running... stores the data from your runs, calories burned, distance traveled, time etc. This is free, but you need to buy the sensor that fits in your shoe from Nike ($30). If you're into running it's worth it... but you could also get a cheap pedometer and find a similar program online where they'll chart your runs for you.
I also like iTalk, which turns the iTouch into a digital voice recorder... but you need to buy the external mic for it. iHandy Level is pretty cool too... if yuh into DIY projects like me it pretty much works like a digital level.
Aside from the apps... the Safari browser and iTouch music players are top-notch, browsing experience better than any hand-held device I've seen out there, including my T-Mobile Touch and the BlackBerry.