Multiple services fork of original multi-platform inadyn, and inadyn-advanced projects. Supports many update services, easily extendable for others including additional servers config file, custom response codes, custom parameter names, and custom update server type. Highly flexible with many per alias option parameters. Supports IPv4, and IPv6. Console, or installed as a service. Unicode. And other features.
dyndns.org (dynamic, static, & custom)
freedns.afraid.org
zoneedit.com
no-ip.com
easydns.com
sitelutions.com
dnsomatic.com
ipv6tb.he.net
tzo.com
dhis.org
two-dns.de
www.dnsdynamic.org
dnspark.com
regfish.de
www.ovh.com
joker.com
system-ns.com
changeip.com
dnsexit.com
nsupdate.com
loopia.com
domains.google.com (requires SSL bridge, like stunnel)
duckdns.org
di.fi
ddnss.de
dynv6.com
selfhost.de