This is the site for Passwords Recovery. MD5 Rainbow Tables are used here.
http://passcracking.com/
http://passcracking.ru/
MD5 :: Reverse engineer your MD5
http://md5.idiobase.de/
The MD5 Collision Database
http://www.md5-db.com/index.php
GData: An Online MD5 Hash Database
http://gdataonline.com/
milw0rm MD5 Cracker
http://www.milw0rm.com/cracker/info.php
milw0rm MD5 checker
https://elitehackers.info/forums/showthread.php?t=5767