What's the best DNS server software?

To me, "best" is the one that's easiest to manage and doesn't break. BIND has done well for me in the past.<p>If you're worried about speed, you're not going to get much improvement by looking for new DNS software. The time it takes a server to look up an answer is dwarfed by the network latency.<p>If you want faster DNS, pay for a service that has anycast servers. They'll cut down on the network latency significantly.

I like NSD as an authoritative server. For a recursor, I would go with either Bind or Unbound.

PowerDNS. Beats the hell out of Bind. Supports almost zero-config DNSSEC too now.

Thanks for the suggestions everybody.

Pretty sure BIND is the standard.