Check out this site, well worth it!!
ShouldIChangeMyPassword.com has been created to help the average person check if their password(s) may have been compromised and need to be changed.
This site uses a number of databases that have been released by hackers to the public. No passwords are stored in the ShouldIChangeMyPassword.com database.
This website is made available as a public service. Please help me maintain it by donating.