The rest of the files in this directory were downloaded from:

http://www.korelogic.com/tools.html#jtr

http://www.korelogic.com/Resources/Tools/rockyou.chr
http://www.korelogic.com/Resources/Tools/rockyou.chr.sign
http://www.korelogic.com/Resources/Tools/README-rockyou.txt

This contribution was announced, briefly described, and then discussed in:

http://www.openwall.com/lists/john-users/2010/02/03/5
http://www.openwall.com/lists/john-users/2010/02/05/1