Open source Network Forensics Analysis Tool (NFAT) for Windows.

Find out if someone is stealing your internet with this small utility.
Utility that displays the bandwidth usage of all network adapters.
Lightweight and free utility for Windows that allows you to quickly view detailed information about a computer's network connections.
Network configuration manager that facilitates switching between different network profiles.
Specialized solution for real-time monitoring of devices on local area networks (LAN).