MaraDNS is a general-purpose DNS server. Dents is a general-purpose DNS server. The distinguishing feature of lbnamed is that it monitors the load of the target servers and avoids giving out the address of a heavily loaded server. I've heard some reports of DNS servers with client-differentiation features similar to tinydns . Caches BIND includes a DNS cache.
Dents includes a DNS cache.
I don't know why anyone would want to use these caches in place of dnscache . DNS clients libresolv is a DNS client library. It is included with current UNIX distributions.