http://instantdomainsearch.com/
A great tool to search domain names. Type in as many words as you like and the results appear below almost instantly via sweet ajax interface. Very nice.
http://www.dotomator.com/
The dot-o-mator allows you to punch in a bunch of keywords (or it has predefined lists) and combine them to make domain names. Then with one click you can check the availability of all those domains. Very useful.
http://www.wildwestdomains.com/
Wild West Domains is the reseller arm of GoDaddy. Same company (I think) but WWD allows you to setup a whitelabel domain reseller system.
