Kon-Boot is described as 'Application which will silently bypass the authentication process of Windows based operating systems. Without overwriting your old password! In other words you can login to your Windows profile without knowing your password' and is an app in the security & privacy category. There are more than 10 alternatives to Kon-Boot for Windows, Linux, BSD and Haiku. The best Kon-Boot alternative is John the Ripper, which is both free and Open Source. Other great apps like Kon-Boot are Lazesoft Recovery Suite, ophcrack, Offline NT Password & Registry Editor and PassFab for PPT.
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...
Password bypass function isn't there, which is present in KonBoot
Lazesoft Recovery Suite is a very easy to use ALL-IN-ONE boot disk that repair your crashed Windows, recover data from deleted, formatted, damaged partition, clone or backup disk, reset your forgotten Windows password.
Ophcrack is a Windows Password cracker based on Rainbow Tables.
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 pas.
Windows stores its user information, including crypted versions of the passwords, in a file called 'sam', usually found in \windows\system32\config. This file is a part of the registry, in a binary format previously undocumented, and not easily accessible.
Recovers lost passwords for encrypted Microsoft PowerPoint files, removes restrictions on editing, copying, and printing, supports multiple attack modes, enables batch processing, features GPU acceleration, and preserves data integrity on Windows systems.
PassFab for PPT serves an entirely different purpose.
Trinity Rescue Kit or TRK is a free live Linux distribution that aims specifically at recovery and repair operations on Windows machines, but is equally usable for Linux recovery issues. Since version 3.
Password Recovery Bundle 2012 is a handy toolkit to recover all your lost or forgotten passwords in an easy way!
Bootable utility resets, removes, or bypasses local and domain passwords across Windows versions and servers, restoring access to locked, disabled, or expired accounts without OS reinstall, preserving files and data integrity, and includes step-by-step on-screen guidance.
Reset Winddows Password is a bootable utility to bypass, remove or reset local and domain administrator or user passwords on Windows 8/7/Vista/XP/2008/2003/2000. Instantly gain access to your computer if you have forgotten administrator password or user account has been locked...
Forgot windows password and cannot log in windows system? Don't panic. iAidsoft windows password recovery can help you reset windows password instantly, it supports CD/DVD or USB Drive to reset windows password.
Stellar Password Recovery for Outlook software recovers lost or forgotten password of MS office files like MS word, MS Excel and MS PowerPoint. It recover both “Password to open” and “Password to Modify”.
Forgot the Administrator's Password? PCLoginNow will help with forgot passwords in Windows NT, Windows 2000, Windows XP, and Windows 2003. You can Reset or Recover Windows NT/2000/XP/2003/Vista Administrator Password with PCLoginNow.
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John the Ripper is a password cracker where Kon-Boot bypasses the login password all together.