Fing - Discover which devices are connected to any Wi-Fi network, map devices, detect intruders, assess...
BlueCat DDI - Unify your DDI (DNS, DHCP and IPAM) solutions to make DDI data an engine for innovation and growth.
Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
ManageEngine OpUtils - ManageEngine OpUtils is an IP address and Switch port management software that includes a comprehensive set of 30+ tools that helps network engineers monitor, diagnose and troubleshoot their IT resources.
SoftPerfect Network Scanner - Powerful multipurpose network administration tool for Windows and macOS
phpIPAM - phpipam is an open-source web IP address management application (IPAM).