L0phtcrack is now open source. It was a commercial password cracker for over 20 years. Here is the history.

https://www.slideshare.net/cwysopal/history-of-l0phtcrack

History of L0phtCrack

The history of one of the most famous Windows password cracker.

@Weld Is this talk recorded anywhere? Got a link?
00 Passwords 2015 Keynote 1: Chris Wysopal

YouTube
@Weld Thanks!