Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
Microsoft IP Address Management Server - IP Address Management (IPAM) in Windows Server® 2012 is an integrated suite of tools to enable...
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use
OpenNetAdmin - OpenNetAdmin provides a database managed inventory of your IP network.
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.
SolarWinds IP Address Tracker - SolarWinds IP Address Tracker software, an all-in-one network monitoring utility, provides you with all the visibility you need into what’s connected to your network.