Automatic IP updater (it works only when the IP was changed). The client was written in java and supports Windows, Mac, Linux GUI and Linux Terminal. It is a FREEWARE.
Ubuntu autostart setting:
bash -c "sleep 10 && /usr/bin/java -jar /PATH/dtdns_updater.jar"
Written in Perl, Fast n Furious DtDNS Updater is running both on Linux and Windows. It is a client that will update any registered domain names through the DtDNS service (www.dtdns.com). It is very light: simple (command-line), fast and small in size.