Nmap - Nmap Free Security Scanner, Port Scanner, & Network Exploration Tool. Download open source software for Linux, Windows, UNIX, FreeBSD, etc.
SolarWinds Network Configuration Manager - SolarWinds is a leading provider of powerful and affordable IT infrastructure management software. Make IT look easy.
Fing - Discover which devices are connected to any Wi-Fi network, map devices, detect intruders, assess...
SoftPerfect Network Scanner - Powerful multipurpose network administration tool for Windows and macOS
Cisco Network Assistant - Cisco Network Assistant simplifies wired and wireless network management, and provides critical product information using Cisco Active Advisor.
Angry IP Scanner - Open-source and cross-platform network scanner designed to be fast and simple to use