DynSite 

DynSite automatically updates your dynamic IP address each time it changes on one or many dynamic DNS or by email. This allows anyone to connect to the servers running on your own computer using a fully qualified domain name.
dynamic dns service client automatic ip update shareware template multilingual template rras ldap smtp

Dynamic Update Tester 

Dynamic Update Tester is an application to test dynamic updates (RFC2136) on DNS servers. The latest version supports secure updates using transaction signatures (RFC2845). This is a test application not an automatic IP updater.
dynamic dns dns server update rfc2136 tsig transaction signature network

TSIG Key Generator 

This tool can generate a TSIG key value (base64) very easily. TSIG is a secure method of authenticating clients making dynamic DNS update requests. The key value generation functionality is already built into Simple DNS Plus and Simple Failover.
tsig key generation dynamic dns failover password hmac-md5