Network Monitoring Tools

The Dude
Free
A network monitor tool.
LiveTcpUdpWatch
Free
Displays live information about all TCP and UDP activity on your system.
TcpLogView
Free
A simple utility that monitors the opened TCP connections on your system.
PRTG Network Monitor
Free Trial
Use PRTG Network Monitor for your LANs, VM, Servers, Websites, Appliances, and more.
AppNetworkCounter
Free
Counts and displays the number of TCP/UDP bytes and packets sent and received by every application on your system.
NetworkUsageView
Free
Extracts and displays the network usage information.
SoftPerfect NetWorx
Free Trial
A simple yet versatile tool that helps you monitor your Internet connection.
LAN Speed Test (Lite)
Free
A free, simple but powerful tool for measuring the speed of your Local Area Network (LAN) wired & wireless, file transfers, hard drives, and USB Drives.
ManageEngine OpManager Free Edition
Free
A network, server, and virtualization monitoring software that helps SMEs, large enterprises and service providers manage their data centers and IT infrastructure efficiently and cost effectively.
Speedtest
Free
PingPlotter
Free
Capture evidence of network problems and share it with people who can help.
TCPView
Free
CurrPorts
Free
Monitoring Opened TCP/IP network ports / connections.
Fing Desktop
Free
Network scanning at its finest.
ipMonitor Free Edition
Free
Essential IT monitoring for small environments.
NetworkMiner Free
Free
Captures and analyzes network traffic for forensic investigation and security analysis.
EMCO Ping Monitor
Free Trial
Monitor the up/down state and the connection quality of network devices.
LANmonitor
Free
Free software for Windows operating systems to monitor small and medium-sized LANCOM networks.
Network Olympus
Free Trial
Monitor network availability, detect bottlenecks and improve uptime with an all-in-one tool.
NetworkOpenedFiles
Free
Displays the list of all files that are currently opened by other computers on your network.