Seems to be a even more terrible than usual naming decision. It appears that DNSCurve is the protocol, and CurveDNS is an implementation. And the official pag

Seems to be a even more terrible than usual naming decision. It appears that DNSCurve is the protocol, and CurveDNS is an implementation. And the official page for the protocol seems to reside at http://www.dnscurve.org http://www.dnscurve.org. What a mess.