Simple tool to configure Windows Filtering Platform (WFP) which can configure network activity on your computer.
simplewall vs OpenSnitch opinions
Closest in terms of functionality if looking for an open source alternative that supports windows instead of linux
Block ads for all your devices without the need to install client-side software. The Pi-hole blocks ads at the DNS-level, so all your devices are protected.
Portmaster is a free and open-source application firewall that puts you back in charge over all your computer's network connections.
GlassWire is a network security monitoring tool and analyzer that visualizes your network activity on an easy to use graph, alerts you of possible threats, manages your firewall, and more.
Windows Firewall Control is a powerful tool that extends the functionality of the Windows Firewall and provides new extra features that make Windows Firewall better. It runs in the system tray and allows the user to control the native firewall easily without having to waste time...
Gufw is an easy, intuitive way to manage your Linux firewall. It supports common tasks such as allowing or blocking pre-configured, common p2p, or individual ports port(s), and many others! Gufw is powered by Uncomplicated Firewall (ufw).
Gufw vs OpenSnitch opinions
it's a Firewall not an application Firewall
the ufw/gufw doesn't help to monitor new connections from your system to "outerspace"
Lockdown Privacy is an Open Source and free firewall for your iOS device. We built the product to help protect users from app developers and analytics companies that are monetizing user data without consent or transparency.
SpyShelter is an effective and easy-to-use security application that helps you to protect your system against known and unknown custom compiled malware.