DNSdumpster.com is a FREE domain research tool that can discover hosts related to a domain. Finding visible hosts from the attackers perspective is an important part of the security assessment process.

The ultimate company name, startup name and website name on the web

Namebox is a simple service to help you list your unwanted and/or unused web domains for sale. It’s free to use and is built to make listing your domains super fast and easy.

Individual or bulk valuation of domain names.

Buy a domain packaged with its own logo. List of startup-friendly names for $250 each.

Full DNS control and setup guides for popular web services like Tumblr

JSONP RESTful interface for DNS lookups

Find other domains associated with your IP/domain (eg shared hosting)

Tumblr’s simple setup and great help for setting up a custom domain with their service

Instant domain searching via Ajax

Free DNS, Static DNS, Dynamic DNS, URL Redirection

Amen. Never link to DefaultDocuments. And (IMO) redirect www.domain.com domain.com

Integrating Rails with Windows security on IIS

Find your own del.icio.us or script.aculo.us…