Top Alternatives to Zenmap

Nmap is a free and open-source utility for network discovery and security auditing. It utilizes raw IP packets to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It is command-line driven, though official GUI versions are also available.

Fing is a comprehensive network analysis tool available for both mobile and desktop, providing an easy way to scan networks, identify connected devices, perform network diagnostics, and monitor network activity. It helps users understand their network environment and troubleshoot connectivity issues.

Angry IP Scanner is a free, open-source network scanner designed for speed and simplicity. It quickly scans IP addresses and ports across any range, making it an essential tool for network administrators and users needing to discover devices on their network.

SoftPerfect Network Scanner is a fast, universal IPv4/IPv6 scanner with a wide array of options and advanced features. It's designed for both system administrators and general users seeking comprehensive network information and management capabilities.

Wireless Network Watcher is a small utility that scans your wireless network and displays a list of all devices currently connected, providing network visibility.

Skipfish is a discontinued command-line web application security scanner known for its recursive crawling and heuristic detection capabilities. It's designed to quickly assess web applications for common vulnerabilities and security flaws.

Nsauditor Network Security Auditor is a comprehensive network security auditing tool designed to help businesses assess and enhance their network infrastructure's security posture. It provides a range of scanning and monitoring capabilities.