Angry IP scanner is free and open-source (IP and port scanner) tool released under GPLv2 license. It scans the network and detect attached details of those devices that are connected to the router. It displays details like IP address, Port address, MAC address, NetBIOS information and so on. The amount of gathered data about each host can be extended with plugins. It can scan IP addresses in any range as well as any their ports. It is cross-platform and lightweight, it can be freely copied and used anywhere. It also has additional features, like NetBIOS information (computer name, workgroup name, and currently logged in Windows user), favorite IP address ranges, web server detection, customizable openers, etc.
