Name:DNSSpy (Paid)
URL:https://dnsspy.io/
Description:Tool to monitor, validate and verify DNS configurations
Utility:This tool – 

• Monitor the domains for DNS changes 
• Alerts when a record changes 
• Keeps a detailed history of each DNS record change 
• Rates the DNS configurations
• Notifies invalid or RFC violating DNS configurations
• Back-ups all the DNS records 
• Supports DNS zone transfer (AXFR) and 2FA
• Helps track competitors