here are some usefull links i found for script kiddies...
http://www.antsight.com/zsl/rainbowcrack/
http://www.vikt0ry.com/progs.php
additional site;
http://www.milw0rm.com/md5/insert.php
http://gdataonline.com/seekhash.php
http://www.oxid.it/cain.html <--highly recommended since not only md5 cracker, but many uses
Courtesy of (P)inoy (H)acking Team
