WhoIsHostingThis.com – Free tool to find out who is hosting any website.
AskMrVideo.com – How-to articles, downloadable templates, video tutorials, and all kinds of useful information for making web videos
MakeInternetTV.org – step-by-step instructions for shooting, editing, and publishing online videos
Search Engine Optimization (SEO)
Link-Popularity.com – See who links to your web site. This service provides an easy one-click method of checking link popularity on three of the major search engines.