PowerDNS is nice. Basic setup is as simple as BIND9's, and their backend system is very flexible, so if you encounter yourself in need of something uncommon, yo

PowerDNS is nice. Basic setup is as simple as BIND9's, and their backend system is very flexible, so if you encounter yourself in need of something uncommon, you can probably still have it easily (using "pipe" backend and a bit of scripting language of your choice).