MDCrack!

John the Ripper is a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. Besides several crypt(3) password hash types most commonly found on various Unix systems, supported out of the box are Windows LM hashes, plus lots of other hashes and ciphers in the community-enhanced version.

Hashcat GUI overlay for Windows and Linux.

Worlds fastest md5crypt, phpass, mscash2 and WPA / WPA2 cracker &Worlds first and only GPGPU based rule engine.

L0phtCrack is a password auditing and recovery application (now called L0phtCrack 6) originally produced by Mudge from L0pht Heavy Industries. It is used to test password strength and sometimes to recover lost Microsoft Windows passwords, by using dictionary, brute-force, hybrid attacks, and rainbow tables. It was one of the crackers' tools of choice, although most use old versions because of its low price and high availability.

World Fastest MD5 cracker BarsWF with AMD and NVIDIA support.

A CUDA & OpenCL accelerated rainbow table implementation from the ground up, and a CUDA hash brute forcing tool with support for many hash types including MD5, SHA1, LM, NTLM, and lots more!

GoCrack provides APIs to manage password cracking tasks across supported cracking engines.

Worlds fastest NTLM, MD5, SHA1, SHA256, descrypt and SL3 cracker.