第一部分：关键词工具

*关键词研究工具*：适当深入地进行关键字研究,为你的网站进行栏目划分及规范关键词部署做准备。
1. Keyword Research Tool - Webmaster
toolkit<http://www.webmaster-toolkit.com/keyword-research-tool.shtml>
2. Keyword External Tool - Google
Adwords<https://adwords.google.com/select/KeywordToolExternal>
3. Keyword Selector Tool - Inventory
Overture<http://inventory.overture.com/d/searchinventory/suggestion/>
4. Keyword Suggestions Overture - SEO
Chat<http://www.seochat.com/seo-tools/keyword-suggestions-overture/>
5. Website Keyword Suggestions - Webconfs
<http://www.webconfs.com/website-keyword-suggestions.php> 6. Keyword
Suggestion Tool - Self SEO<http://www.selfseo.com/keyword_suggestion_tool.php>

*关键词密度*：一个关键字、词在页面出现的个数及所占文本的比率。
7. Keyword Density - SEO
Chat<http://www.seochat.com/seo-tools/keyword-density/>
8. Keyword Density & Proeminence - Ranks
<http://www.ranks.nl/tools/spider.html> 9. Keyword Density Analyzer -
Keyword density <http://www.keyworddensity.com/> 10. Analyze Keywords
Density - Google rankings <http://googlerankings.com/ultimate_seo_tool.php>
11. Keyword Density Checker -
Webconfs<http://www.webconfs.com/keyword-density-checker.php>
12. Keyword Density Analyzer Tools - SEO
Book<http://tools.seobook.com/general/keyword-density/>

*竞争对手分析*:可以分析目标关键词的竞争对手是谁，并分析竞争对手用过的关键词。
13. Competition Tool - SEO Digger <http://seodigger.com/> 14. Competition
Analysis Tool - Seoscorecard <http://www.seoscorecard.com/> 15. Top
Competitor Tool -
Webuildpages<http://www.webuildpages.com/seo-tools/top-competitor-tool.php>

*搜索引擎关键字位置的工具*:利用这些工具来检查你的关键词目前在主要搜索引擎如Google, Yahoo, MSN所处的位置。
16. Search Engine Keyword Position - SEO
Chat<http://www.seochat.com/seo-tools/search-engine-keyword-position/>
17. Keyword Analysis Tool -
Mcdar<http://www.mcdar.net/KeywordTool/keywordtool.asp>
18. SERPS Position Checker - LinkVendor
<http://www.linkvendor.com/seo-tools/serps-position.html> 19. Website
Position Tool - Rnk1 <http://www.rnk1.com/>