network-monitor

lightweight, open-source network monitor for Windows that displays live upload/download speeds directly on the Taskbar with a native look and feel.

Instantly see your current & past network activity. Detect malware, & block badly behaving apps.

Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on your computer.

Portmaster is a free and open-source application that puts you back in charge over all your computers network connections.

An effective firewall designed for Windows 7 and later versions, offering both simplicity and robustness.

Diagnostic tui for Windows power users