Favs
Google Keyword Suggestion Tool – Get keyword suggestions and search volumes
Google Webmaster Tools – Learn what your site needs to succeed
XML Sitemap Submitter – Submit XML sitemap to all 3 search engines at once
Keyword Density Checker – Onpage keyword density checker by David Naylor
Quintura Search Engine – Visually see which keywords are associated with a search term
Keyword & Industry Research Tools
Google Insights – Historic Keyword Research Tool
Search Combination Tool – create a combination of terms to search on the search engines fast
SEM Rush – Research specific keywords or domains/competitors’ traffic and rankings
Spyfu – Keyword and competition spy tool for keyword research
Lexipedia – Learn words associated with any word/phrase for LSI (antonyms, synonyms, etc)
Keyword Spy
Google Trends
AdWords Suggestion Tool
SEO Analysis Tools
Code-to-Text Ratio – Compare percentage of text to percentage of coding on any given website
Search Engine Spider Simulator – Check how a site looks to search engine spiders
BizziBuzz Quick Report – (just replace “jameseo.com w/your site in url, or signup) site analysis tool
Website Grader – In-depth Analysis of your website (email required)
Review My Web – Quick SEO review of website (email required)
SEO Analyzer Tool – Onpage SEO analysis by SEO Workers
Keyword Density Checker – Another keyword density checker, by Webconfs
SEO Workers – SEO Analysis Tool w/ Google Matt Cutts Explanations
http://www.plagspotter.com/prices/
Other Website/SEO Tools
LedBetter Submit URL Tool – Free Search Engine Submissions Tools (use spam email)
Site Analytics Traffic Tool – Domain Traffic Research Tool by Compete.com
Whois Domain Tool – Whois and domain research tool
Rank Checker – Check the rankings for up to three keywords
PageRank Verifier – Check the real PageRank of a website
Pingomatic – Update different search engines that your blog has been updated
Ping FeedBurner – Feed Updater by Google’s Feedburner
Tool Sites
Webconfs SEO Tools – Similar page checker, redirect check, keyword density check & more
SEO Chat Tools – Domain age check, meta analyzer, page size, keyword cloud & more
Bing Webmaster Tools – Tools for webmasters by Bing (WannaBe Google Webmaster Tools)