It's build on top of Sun's smartcard API(s) so it does not require any external dll or framework.
It can be really useful when studying / developing / testing smart cards technologies
Click here to execute now (requires Sun Java 1.6+)
If you prefer to download the application, download the compiled jar package, and double-click on the jar file.
If this does't work, open a shell (or command prompt), cd to download folder and type
java -jar JSmartCardExplorer.jar