TinyWall - Lightweight and non-intrusive firewall
Domain-Monitor.io - Looking for the complete domain and website uptime monitoring solution? Domain Monitor keeps an eye on your website, cron, SSL and domain name 24/7 and will alert you through Email, SMS and web when something stops working.
Emsisoft Online Armor Firewall - Emsisoft Online Armor Firewall is a freemium online firewall protection system by the Emsisoft that is based on the own independent protection technology of the Emsisoft.
DomainMOD - DomainMOD is an open source application written in PHP & MySQL used to manage your domains and other internet assets.
Windows Firewall Control - Windows Firewall Control is not the built in firewall system in the Windows operating systems.
Domain Punch - Solutions for Tracking and Managing Domain Expiry Dates, Name Servers, A, CNAME, SSL, MX, SPF, DMARC, DKIM Records & More.