Google Alerts: Allow Google to dig through its billions of indexed webpages to find content that fits the keywords you seek. This tool works especially for staying up-to-date with blog chatter about your business and the products in your industry. Just set Type = Blog when adding an alert. Also works well to find people talking about your business.
Microsoft adCenter Labs -- Demographics Prediction: While the margin of error on this tool should be seen as very high, you can find extremities in demographics for a your niche, such as male/female ratio.
SEO Chat -- PageRank Lookup: This is my favorite PageRank lookup tool. You can enter up to 100 URLs to find their PageRank.
Soovle: A very... strange keyword search research tool that searches Wikipedia, Amazon, YouTube and a few other websites for your keywords. This is more entertaining than useful.
Google Trends: Learn how the waves of the Internet are breaking by researching trends in search over the past few years. For example, "foreclosures" shows a strong increase in early 2008 (and has yet to go down).
DMOZ Human-edited web directory: The holy grail of web directories. In my opinion, it is pretty much the only directory that matters. Google loves DMOZ. This should be a first stop for every online entity once their site is up and running. Acceptance into DMOZ can take up to several months, so make your request ASAP and be patient.
Wordpress: This is one of the most popular and user-friendly content management systems in use today. Wordpress is a blog out of the box, but can be turned into a full-fledged ecommerce website.
SXC stock photos free: While limited in their selection, most images are high quality and free to use. This is the quickest way to find images without paying or getting into sticky copyright laws.
"I must confess that I've never trusted the Web. I've always seen it as a coward's tool. Where does it live? How do you hold it personally responsible? Can you put a distributed network of fiber-optic cable "on notice"? And is it male or female? In other words, can I challenge it to a fight?"
Steven Colbert, The Colbert Report
"Information technology and business are becoming inextricably interwoven. I don't think anybody can talk meaningfully about one without the talking about the other."