Ophcrack is a portable Windows password cracker based on a time-memory trade-off using rainbow tables. This is a variant of Hellman's original trade-off, with better performance. It recovers 99.9% of alphanumeric passwords in seconds.

Features:

Cracks LM and NTLM Windows hashes

Free tables available for Windows XP, Vista and 7

Brute-force module for simple passwords

Audit mode and CSV export

Real-time graphs to analyze the passwords

LiveCD is available to simplify the cracking

Loads hashes from encrypted SAM recovered from a Windows partition

Similar:

How to Change or Recover Your Password in Windows 10

How to Find Your Wi-Fi Password

How to Show Hidden or Masked Passwords Behind Asterisks

How to Scan for Compromised or Weak Passwords in Google Chrome

How to View, Edit, and Manage Your Google Chrome Passwords

Editor's Note:
MajorGeeks mirrors are the 15.8 MB portable app, version 3.8.0. The Live CD is 680 MB and at version 3.6.0.