1. Wireshark

Overview: Wireshark is a widely-used network protocol analyzer that provides deep insight into your network traffic.

• Features: Captures live data packets, offers detailed packet inspection, supports various protocols.
• Use Case: Ideal for diagnosing network issues and identifying unusual activity.

2. Zabbix

Overview: Zabbix is a robust monitoring solution for networks, servers, and applications.

• Features: Real-time monitoring, anomaly alerts, detailed reporting.
• Use Case: Suitable for advanced users seeking comprehensive monitoring.

3. Nagios Core

Overview: A powerful open-source tool for monitoring network devices and applications.

• Features: Real-time status of network nodes, customizable alerts, extensible with plugins.
• Use Case: Perfect for home users managing multiple devices.

4. PRTG Network Monitor Free

Overview: While the full version is paid, PRTG offers a free tier for smaller setups.

• Features: Intuitive dashboards, pre-configured sensors, critical event alerts.
• Use Case: Great for beginners needing user-friendly network monitoring.

5. OpenNMS

Overview: OpenNMS is an enterprise-grade tool that’s free and open-source, suitable for home networks as well.

• Features: Tracks device performance, fault detection, scalable for growth.
• Use Case: Ideal for tech-savvy users wanting a professional-grade solution.

6. ntopng

Overview: A high-performance network traffic monitoring system.

• Features: Real-time traffic analysis, visual dashboards, bandwidth hog identification.
• Use Case: Best for monitoring internet usage and pinpointing bottlenecks.

7. Cacti

Overview: A network graphing tool that visualizes device performance over time.

• Features: Time-series graphs, SNMP integration, customizable templates.
• Use Case: Excellent for users needing visual insights into network performance.

8. Icinga

Overview: Icinga is a flexible monitoring solution for network devices and services.

• Features: Monitors availability, supports real-time alerts, advanced configurations.
• Use Case: Useful for users requiring tailored monitoring setups.

9. WiFi Analyzer (Open Source)

Overview: A lightweight tool for analyzing WiFi networks.

• Features: Detects signal strength, interference, and provides optimization recommendations.
• Use Case: Ideal for improving home WiFi coverage and performance.

10. LibreNMS

Overview: An automatic network monitoring system designed for ease of use.

• Features: Tracks bandwidth usage, customizable notifications, intuitive interface.
• Use Case: Perfect for users wanting an easy-to-set-up monitoring tool.