BIND - BIND is by far the most widely used DNS software on the Internet.
Tool.Domains - Search free to register expired domains
PowerDNS - PowerDNS offers open source DNS software, services, and support.
Brandpa - Domain names for startups
dnsmasq - Dnsmasq is a lightweight, easy to configure DNS forwarder and DHCP server.
BrandBucket - The original marketplace for business names and creative domain names.