DNSLookup

Free Web page test
Free Multi-RBL Lookup
Free IP Tools
www.DNSreport.com
djbdns record builder
What's My IP
IP Calculator: Calculate hosts, masks, braodcast
DNSstuff.com: This even does reverse DNS lookups
ZoneCheck: Is your zone rfc complient
SamSpade Online Tools
All domain names and internic registrations
Developments in DNS: Investigating Bind 8 page 1
CERTŪ Coordination Center
Web Interface to Whois
Paul Balyoz's ( Dint, Domtools, Hiermap, Cachebuild )
SSH w/ DNS
CIDR and Subnetting
DNS ERRORS
WebPerf.org - Get stats on a web site
make-record.adp - TinyDNS record maker
djbdnsRecordBuilder - TinyDNS record maker
djbdns-conf - djbdns configuraiton interface
Vegadns - djbdns configuraiton interface
Graph djbdns dnscache usage
djbdnsrocks.org
dhcp_dns - dynamic dhcp driven update of dns