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.
ViewDNS.info - Free DNS related tools including Reverse IP Lookup, DNS Propagation Checker, Chinese Firewall Test...
DomainMOD - DomainMOD is an open source application written in PHP & MySQL used to manage your domains and other internet assets.
Whats My DNS - Instantly check your domain names current IP address and DNS record information against multiple name servers located in different parts of the world.
Domainer - Manage All Your Domains and Websites
NsLookup.io - A simple and powerful tool for querying DNS records