Here are some useful tools to help you with your Web marketing efforts:
The Internet Marketing Handbook
A free resource that contains almost 100 tools and learning resource that help to master Internet Marketing and SEO
URL Redirect Server Response Check
Make sure your server is giving search engines the correct response codes.
Reverse IP lookups, domain history, DNS tools and more.
Online CSS Optimizer/Optimiser is a web tool for reducing the file size of cascading style sheets.
We Build Pages
A bunch of useful SEO tools.
Feed The Bot
A useful little spider emulation tool.
Google Keyword Suggestion Tool
Enter a keyword or website and Google will suggest/extract keywords.
Google Traffic Estimator
Get quick traffic estimates for new keywords without adding them to an account or using the AdWords sign-up wizard.
Google Ad Preview Tool
When you search for your ad multiple times on Google, it can affect ad performance by showing your ad too many times without being clicked on, so use the ad preview tool. This tool will show you exactly which ads are appearing for your keywords in any given location, including your own ad, without affecting your quality score.
Keyword Typo Generator
Find common misspellings and keystroke errors.