DNSLookup

Free Web page test
Free Multi-RBL Lookup
Free IP Tools
djbdns record builder
What's My IP
IP Calculator: Calculate hosts, masks, braodcast
DNSstuff.com: This even does reverse DNS lookups
wiseTools
All domain names and internic registrations
Web Interface to Whois
lifewithdjbdn
make-record.adp - TinyDNS record maker
djbdnsRecordBuilder - TinyDNS record maker
djbdns-conf - djbdns configuraiton interface
Vegadns - djbdns configuraiton interface