Cardito

Description
How To Use:

Cardito.exe <Folder Path>

e.g. Cardito.exe "D:\Card Data"

Pros:
Very Quick and Lightweight

Cardito is a simple Credit Card Number searching tool. It does a simple recursive scan of all files in the specified directory and checks the condition of the found numbers to Luhn's algorithm. It does not require installation. It has to be placed locally on the machine which is to be scanned.
Cardito is small yet powerful. Currently, it supports the following file formats to be scanned: txt, csv, log, xml, htm, html, rtf. If you feel there is a need to add any more formats which you encounter, it is very simple to do so from the source. Also, you can raise a ticket for the same. If I feel there is an increasing demand for some file formats to be added to the executable, I'll sure compile it in the exe and release it.
Enjoy using Cardito and drop your reviews good or bad. :)