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



  2. LuLu is the free, shared-source firewall for macOS. Its goal is simple; block any unknown outgoing connections, until approved by the user.

  3. 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.

  4. Portmaster is a free and open-source application firewall that puts you back in charge over all your computer's network connections.

  5. 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.

  6. OPNsense includes most of the features available in expensive commercial firewalls, and more in many cases. It brings the rich feature set of commercial offerings with the benefits of open and verifiable sources.

  7. A firewall protects your computer against unwanted guests from the Internet. But who protects your private data from being sent out? Little Snitch does!

  8. OpenSnitch is a GNU/Linux port of the Little Snitch application firewall.

  9. NetLimiter is an ultimate Internet traffic control and monitoring tool designed for Windows. You can use NetLimiter to set download/upload transfer rate limits for applications or even single connection and monitor their Internet traffic.

  10. Comodo Firewall is a personal firewall, a genre of security software that secures PCs by policing Internet traffic on an app by app basis.

    Bundleware

    The app installs other components by default such as Dragon Web Browser. You must click "Options" during install to deselect those components.

  11. 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).

  12. Comodo Internet Security is a free, very voluminous and multi-layered security application that keeps hackers out and personal information in.

    Bundleware

    The app installs other components by default such as Dragon Web Browser. You must click "Options" during install to deselect those components.

  13. TinyWall is a free software to harden and control the advanced firewall built into Windows Vista, Windows 7 and Windows 8.

  14. NethServer is a CentOS-based Linux distribution for servers. The product's main feature is a modular design which makes it simple to turn the distribution into a mail server and filter, web server, groupware, firewall, web filter, IPS/IDS or VPN server.