ophcrack
Open SourceOphcrack is a free, open-source program for recovering Windows logon passwords using rainbow tables. Available as a Live CD or installable application, it can quickly crack most passwords by targeting LM and NTLM hashes, providing a vital tool for system administrators and users who have forgotten their passwords.
Key Features
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Rapid password cracking using rainbow tables.
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Free and open-source software.
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Easy to use graphical interface.