Notable DNSCurve users
The seznam.cz web crawler uses DNSCurve resolvers.
IANIX has been 100% DNSCurve since 2012.
TinySSH runs DNSCurve nameservers and distributes code that benefits from DNSCurve. TinySSH can be run over TCP or CurveCP.
CURVEPROTECT protects DNS and other protocols with DNSCurve and CurveCP. It also supports DNSCurve on its own domain.