DDClient - by WhoCares - I hope this one will work

Thanks but that was not what I asked about. Or do you use the old one:
Dyndns Client by super-poussin
viewtopic.php?f=47&t=22415

Or just the classic ddclient:
http://sourceforge.net/apps/trac/ddclient

No-IP is not represented at DDClient support pages:
http://sourceforge.net/p/ddclient/wiki/protocols/

But my guess is that they are user friendly and support the standard config:
## single host update
protocol=noip, \
login=userlogin@domain.com, \
password=noip-password \
myhost.no-ip.biz

And I finally understood why most of my DynDNS.org addresses stopped working. The free accounts at DynDNS must be updated at least every 30 days, but not with the same IP. So that leaves me and a lot of others out. Because the dynamic IP provided by my ISP changes very seldom.

Edit: updated link to DDClients supported protocols.