You could spend half your life and most of your budget trying to figure out which keywords will work best for your site, for your content, and for your search engine rankings. Tools, like the ones listed here, will make optimizing those keywords at least a little easier.
- Google Keyword Tool
- Microsoft adCenter Labs Keyword Research Tools
- SEO Book Keyword Suggestion Tool
- Submit Express Keyword Suggestion Tool
- McDar Keyword Analysis Tool
- BRL Keyword Suggestion Tool
- Trellian: Search Word Suggestion Tool
- Keyword Intelligence
- The Permutator
- Keyword Typo Generator
- Digital Point Solution Search Engine Ranking Tools
- Keyword Density Analyzer
- Search Engine Ranking Report
- Web Site Keyword Suggestions
Above are keyword tools for help to create your site's keyword. I hope it's help you and you know any free and new keyword tools then share with us in comments,thanks.