Credit Card Verifier
Credit Card Verifier allows you instantly check all major credit cards number for validity without submitting the card number online. Credit Card Verifier can validate any VISA, MasterCard, Diners Club, Carte Blanche, EnRoute, American Express (AMEX), Discover, or JCB credit card number. ... Credit Card Verifier detects and displays credit card type early depending on the first digits of the card number. ... Credit Card Verifier only verifies whether or not a credit card checksum is valid; it does not validate the credit card account.
http://www.credit-card-verifier.com/download/credit-card-verifier.exe - 292Kb - Download - Screenshot

Easy Credit Card Verifier
Easy Credit Card Verifier instantly checks credit card numbers for validity using LUHN10 algorithm. Using this software you may check MasterCard, VISA, Diners Club, EnRoute, Carte Blanche, AMEX, Discover, or JCB credit card numbers without submitting them online.
http://www.ashkonsoftware.com/download/ecverify.exe - 363Kb - Download - Screenshot

Online Credit Card Verifier
Online Credit Card Numbers Validation with MOD-10. Simply put the credit card number and press the [Validate] button. There are two result variants. [your_card_number] is not a valid card number will appear if the card number isn't valid. If the card number is valid you will get the message... Simple web interface without additional software.
http://www.tm-research.com/online/credit-card-verifier.html - 6Kb - Download - Screenshot