Here are some free online
search engine tools:
Link Check Popularity Tool
Checks for the number of links reported for any given website on Google,
Alta Vista, MSN, Yahoo, HotBot, and alltheweb.
Checks for your position, on any given keyword, in Google and Yahoo
A very cool tool to help you create keyword sets in the same family.
This tool provides a good way to find backlink neighborhoods.
Reports of your current and previous Google PageRank, Alexa Rank and
incoming links for your website.
Keyword Density Analyzer
keyword density and word depth calculator
Keyword Suggestion Tool
This is a handy little tool will show you the results of your query from
both Wordtracker and Overture for determining which phrases are searched
Search Engine Script
Put Search Functionality On Your Website
Anchor Text Analyzer
Quality backlinks is one of the most important factors in Search Engine
Provides detailed reports on various aspects of your web pages
including: Broken Links, Misspelled Words, HTML Validation, Load Time
Analysis, Meta Tag Optimization, Image Optimization, etc....
Using this tool you can: - See how search engine robots analyze your web
site - Receive tips on how to improve your Meta Tags - Check the
keywords used on the page and find the keyword density.
Wizzard that builds the meta tags for you.
Here is another one.
Google Search Counts Tool
Get a very good estimate of how many searches a keyword gets on Google
every month. Use this to maximize your AdSense or Adwords performance.
Engine Tools here