Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Kon-Boot - Kon-Boot is a password hacking, password recovery tool for Windows and Mac.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
ophcrack - Ophcrack is a Windows Password cracker based on Rainbow Tables. Features
Advanced IP Scanner - Advanced IP Scanner shows all network devices, gives you access to shared folders, and can even remotely switch computers off. Download it Free.
Reset Windows Password - PCUnlocker is a bootable recovery utility to bypass or reset lost administrator and user passwords on Windows 10 / 8 / 7 / Vista / XP / 2019 / 2016 / 2012 / 2008.