chntpw is a software utility for resetting or blanking local passwords used by Windows NT, 2000, XP, Vista, 7, 8 and 8.1. Developed by Petter Nordahl-Hagen
License: Open Source
Ophcrack is a free open source (GPL licensed) program that cracks Windows log-in passwords by using LM hashes through rainbow tables. The program includes the ability to import the hashes from a variety of formats, including dumping directly from the SAM files of Windows. On most computers, ophcrack can crack most passwords within a few minutes. Developed by Objectif Sécurité
License: Open Source
Ophcrack is primarily focused on password recovery using rainbow tables and offers a user-friendly interface, while Offline NT Password & Registry Editor specializes in resetting passwords and editing the registry but may be less intuitive for beginners. Both are effective tools for managing Windows passwords but cater to slightly different needs.