Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms.
Features:
» Runs on Windows, Linux/Unix, Mac OS X, ...
» Cracks LM and NTLM hashes.
» Free tables available for Windows XP and Vista.
» Brute-force module for simple passwords.
» Audit mode and CSV export.
» Real-time graphs to analyze the passwords.
» LiveCD available to simplify the cracking.
» Loads hashes from encrypted SAM recovered from a Windows partition, Vista included.
» Free and open source software (GPL).
Windows Version Download here

ophcrack-win32-installer-3.3.1.exe
Windows 2000, XP, Vista and 7 are supported.
Source Download here

ophcrack-3.3.1.tar.bz2