Luhn

Algorithm::LUHN is a Perl module to calculate the modulus 10 double add double checksum. SYNOPSIS use Algorithm::LUHN qw/check_digit is_valid/; $c = check_digit("43881234567"); print "It worksn" if is_valid("43881234567$c"); $c = check_digit("A2C4E6G8"); # this will cause an error... Platforms: *nix

CreditCardCheck is a Cocoa/Objective-C class to check for the validity of credit card numbers using the Luhn Algorithm Platforms: Mac

THC-Shagg is a modular application to bruteforce check digit algorithms. THC-Shagg project can be used to gain information about serial numbers that use check digit algorithms. Once THC-Shagg has analysed a set of serial numbers and found matching check digit algorithms, it is able to generate... Platforms: *nix

Command language audit software - used for audits: * audit identification of duplicates, gaps, audit for outliers, population summaries, data classification and stratification, univariate statistics, audit sample size computations, percentiles/quartiles, Federal holiday dates, histograms and... Platforms: Windows

A Java library for validation of credit cards. Implements the Luhn Algorithm to ensure the card number is well formed, checks card type prefix's and length. The rules are stored in a text file allowing new cards to be added without changing the source Platforms: Windows, Mac, Linux