Nmap

Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing.

Free Open Source Mac OS X Windows Linux BSD

Zenmap

Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Zenmap aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users.

Free Open Source Mac OS X Windows Linux

Angry IP Scanner

Angry IP Scanner (or simply ipscan) is an open-source and cross-platform network scanner designed to be fast and simple to use. It scans IP addresses and ports as well as has many other features.

Free Open Source Mac OS X Windows Linux Java

Advanced IP Scanner

Network scanner to analyse LAN, runs as a portable edition, provides remote control of computers (via RDP and Radmin), and can even remotely switch computers off.

Free Windows

Wireless Network Watcher

Wireless Network Watcher is a small utility that scans your wireless network and displays the list of all computers and devices that are currently connected to your network.

Free Windows

Domotz

Monitoring and Tech Assistance system by mobile app with free trial.

Commercial Linux Android iPhone iPad Web

Dipiscan

Dipiscan is a free IP scanner that allows you to remotely retrieve information about machines on your network using a clear and ergonomic interface (as well as a command-line mode) .

Free Windows

Network Scanner (LizardSystems)

Network Scanner is an IP scanner for scanning both large corporate networks with hundred thousands of computers and small home networks with several computers.

Free Personal Windows

MASSCAN

This is the fastest Internet port scanner. It can scan the entire Internet in under 6 minutes, transmitting 10 million packets per second.

Free Open Source Mac OS X Windows Linux BSD

Who’s On My Wifi

As the owner of a wireless network, you want to protect it from hackers and freeloaders. Download Who's On My Wifi and find them today.

Freemium Windows Android iPhone

LanSpy

LanSpy is a set of network utilities brought together in a single program with simple and easy-to-use interface. LanSpy help network administrators maintain and manage...

Free Windows