
For SEOs who use the Google Toolbar, SEOBook has come up with a variety of free, time-saving Google Toolbar Buttons that provide instant links to all manner of frequently used SEO tools. It even shows you how to create your own toolbar buttons. The buttons you can select from include:
Link Reputation/Link Popularity
Yahoo Site Explorer
Yahoo Linkdomain: [...]

SEOBook and Jay Tiller of WidgetWaker has created two very handy free iGoogle SEO and internet marketing related gadgets that allow you to access SEO information quickly right from your desktop. Once you have your iGoogle home page set up, they are easily installed.
The Keyword Research & Competitive Analysis Tools Gadget gives you quick access [...]
If you are a blogger or blog reader, Google’s Blog Search tool is a must. It allows you to to explore the blogosphere efficiently and effectively to find the topics you are interested in, generally or targeted for content, to find out what’s being talked about. All blogs that publish a site feed (RSS or [...]