Google Sitemaps
https://www.google.com/webmasters/sitemaps/login

Tell Google how their spiders should crawl your site, or when you have new content available for indexing. Google Sitemaps is basically a website crawling submission and notification system. You submit a sitemap to Google in one of several approved formats, and tell their SEO crawlers as to how frequently to crawl your site. Not only does this get your new stuff indexed faster - it’s absolutely essential for those with dynamic site content. NOTE: This does not replace Google’s regular crawling and indexing system; in their own words, “A Sitemap simply gives Google additional information that we may not otherwise discover.”

This website provides an easy method you can use for both google and yahoo sitemap inclusion:

XML Sitemap Generator
http://www.xml-sitemaps.com

Web Marketer Larry Chase also has reviewed other Google “Freebie” tools which are helpful to marketers — these include;

Google Keyword Ranking Tools
Check Rankings
http://www.checkrankings.com

This tracker automatically checks your position on Google (and a number of other search engines) for up to 10 keywords every day. This type of tool is especially useful when implementing changes that will impact your search engine ranking. Your daily results are saved in a nice graphical chart so that you can you can assess your performance and improvement over time.

Google Rank Position
http://www.prsearch.net

This tool allows you to check your Google ranking for up to 15 keywords or phrases at once.

Keyword User Demographic Analysis
Google Ageshare Calculator
http://blog.outer-court.com/ageshare/

Google Sandbox Tool
Sandbox Detection Tool
http://www.seomoz.org/tools.php

New websites face a struggle in terms of getting appropriately ranked on Google. There is a waiting period of sorts that they must go through while Google determines just how important and valid the site and how nicely the site “plays with others” - hence the term “Google sandbox”, which SEO experts use to describe this situation. The process that can take months as you build your virtual linking relationships and history. You can use this tool to detect whether you rank disproportionately poorly in Google’s rankings as compared to other search engines. Simply enter your URL and you will be given your results and an overall score based on how disparate your results are and the relative strength of SEO factors such as your links, your site age, your PageRank and so on. From this information you can determine whether you have a sandbox issue… or whether your site is simply not very well optimized for Google.

Google Optimization Checklist
99 Google Ranking Factors Checklist
http://www.vaughns-1-pagers.com/internet/google-ranking-factors.htm

There are over 100 SEO factors that Google uses to rank pages in the Google search results. While no one knows all the rules, rhymes and reasons, SEO experts have taken an educated guess to compile this exhaustively detailed list. Whether you are looking to improve your Google ranking (and who isn’t?) or just getting started, this checklist is an excellent resource. It details all of Google’s likes and dislikes on everything from redirects to page theming to keyword stemming, and it also highlights the proprietary technical differences or requirements for which Google has filed for patent protection. The more you know, the better prepared you will be to conquer the challenge that is Google.

Google Optimization Tool
Search Engine Preparedness Tool
http://www.web-inspect.com/search-engine-preparation.php

The results analyze your title tag, keywords, description, anchor tags, headlines, alt tags and more, complete with detailed suggestions for improvement. This tool could be a boon for search engine optimization consultants, who just may find justification for next month’s retainer in the results.

Google Link Popularity Checker
Domain Popularity Check
http://www.linkvendor.com/seo-tools/domain-popularity.html

The strength of your backlinks (sites linking to you) is a key component of your Google ranking. This invaluable tool will show you all the sites that are linking to your site according to Google. In addition to the URL of the site you will also see the sites IP addresses, their Google PageRanks and the anchor text that is used on those sites to reference your link. With these results in hand, you can determine which of those sites that link to you are the most important and make sure that their anchor text is as powerful and keyword rich as possible - all in the effort to better improve your Google search engine ranking.