Keywords are important for a website to get good rank or position in search engines.Without seriously considering the keywords the search engine optimization would not be result oriented in future. But how one can find the suitable keywords? It is a difficult task. 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:

https://adwords.google.com/select/KeywordToolExternal

WordTracker:

http://freekeywords.wordtracker.com/

SEO Book Keyword Suggestion Tool:

http://tools.seobook.com/general/keyword/

Submit Express Keyword Suggestion Tool:

www.submitexpress.com/keytracker.php

Global Promoter Keyword Suggestion Tool:

www.globalpromoter.com/seo-tools/keyword-suggestion-tool.cfm

McDar Keyword Analysis Tool:

www.mcdar.net/KeywordTool/keywordtool.asp

Overture Keyword Selector Tool:

http://inventory.overture.com/d/searchinventory/suggestion/

BRL Keyword Suggestion Tool:

www.build-reciprocal-links.com/keyword-suggestion/

Trellian Search Word Suggestion Tool:

www.keyworddiscovery.com/search.html

Microsoft adCenter Labs Keyword Research Tools:

http://adlab.microsoft.com/ResearchPaidSearch.aspx

Keyword Intelligence:

www.keywordintelligence.com/

The Permutator:

www.boxersoftware.com/thepermutator.htm

Keyword Typo Generator:

http://tools.seobook.com/spelling/keywords-typos.cgi

SEMPhonic:

http://semphonic.com/

Digital Point Solution Search Engine Ranking Tools:

www.digitalpoint.com/tools/keywords/

Keyword Density Analyzer:

www.keyworddensity.com/

Search Engine Ranking Report:

www.top25web.com/cgi-bin/report.cgi

Web Site Keyword Suggestions:

www.webconfs.com/website-keyword-suggestions.php

These tools are little bit different from each other and their keyword statistic will differ little but ignore it. Any how these tools are not less than a blessing to decide the right keyword in moving through the sea of internet.