I tried godaddy and they don't have it in their list of extensions. I tried to contact them but couldn't find godaddy's email. Any help is appreciated.
You can list .is at Godaddy but they won't appear anywhere except Namecheap. Namecheap is the only mainstream registrar supporting .is, Godaddy used to but not anymore.
No, there is none. Afternic is a Godaddy brand, using it means listing your domains with Godaddy, but as I said above, for .is domains you can only achieve having them listed on Namecheap.
Don't listen to those on "pseudo" etc, if the name fits, do it. Clearly anti non-com bias with no rational other than self-serving interests, with no relation to the thread topic. Gets really tiresome really.