RainbowCrack : Password Cracking App That Uses Time-Memory trade algorithm to crack password hashes

John The Ripper : Password Cracking Software For Several Crypt Password Hash Types

Cain & Able : Easy Recovery of Various Types of Passwords Via Network Sniffing, Dictionary Cracking, Brute-Force & Cryptanalysis Attacks. Also Records VoIP Conversations, Decodes Scrambled Codes, Recovers WEP keys, Reveals Password Char, Snoops Cached Info & Analyzes Routing Protocols

Bruter :  Network login brute-forcer

NT Password & Registry Editor :  Deletes Windows Passwords Instead of Recovering or Cracking

Trinity Rescue Kit : Free Bootable Windows 7-8 Password Recovery Tool

OPH Crack : Bootable Live CD For Windows XP-7 Password Recovery

KonBoot : Bypass The Authentication Process of 32Bit Windows Based Operating Systems. Without Overwriting Your Old Password XP-7