Passwords
Cain's password list, fairly big and covers a lot: List-cain.txt
John's password list, much smaller and more targeted/efficient: File:List-john.txt
List of passwords stolen from MySpace (not by me!), covers most common modern passwords: File:List-myspace.txt
List of passwords stolen from MySpace with associated counts (not useful for bruteforcing, but great for studying): File:Myspace-counts.txt
List of passwords stolen from PHPBB (not by me!), covers most easy to crack modern passwords: File:List-phpbb.txt
List of passwords stolen from PHPBB with associated counts (not useful for bruteforcing, but great for studying): File:Phpbb-counts.txt
List of "500 worst passwords of all time", from this story: File:500-worst-passwords.txt
All English words: File:English.txt
Another English word file, helpfully provided by BlackFrog: File:English2.txt
The password list used by the Conficker worm: File:Connficker.txt
A German password list, ordered by length and then alphabetically. It's released under GPL (is that even valid? whatever), so I left the header intact -- make sure you remove it if you don't want to try the lines as passwords: File:German list.txt
List of American cities, generated by [http://ha.ckers.org/blog/20090417/us-cities-dictionary/ RSnake: File:US Cities.txt