Cardpeek is a Linux/Windows/Mac OS X tool to read the contents of ISO7816 smart cards. It features a GTK GUI to represent card data is a tree view, and is extendable with a scripting language (LUA).

The goal of this project is to allow smart card owners to be better informed about what type of personal information is stored in these devices.

The tool currently reads the contents of :

EMV Pin and Chip cards, including NFC ones.
Navigo public transport cards, MOBIB and RavKav cards.
The French health card "Vitale 2"
Electronic/Biometric passports in BAC security mode.
GSM SIM cards (but not USIM data)
The Belgian eID card

It can also read the following cards with limited interpretation of data:

Some Mifare cards (such as the Thalys card);
Moneo, the French electronic purse;

More info on the Wiki here: http://code.google.com/p/cardpeek/wiki/Main