nsd3 3.2.4-1ubuntu0.1 (amd64 binary) in ubuntu lucid

 NSD3 is a fast, authoritative only, high performance, simple
 and open source name server.
 .
 NSD was primarily developed by NLnet Labs on request from and in close
 cooperation with RIPE NCC, as an alternative name server software to be
 run on the root name server RIPE NCC operates.
 .
 Note: 3.x configuration is not backward compatible with the 2.x series,
 but lives in /etc/nsd3 so it won't overwrite your nsd 2.x one.