Seo and webmasters tools

Check your search engine placement for multiple keywords
http://www.googlerankings.com/mkindex.php 

This one works really well, it is in spanish
http://www.tools-live.com/google-ranking.html

The first thing you should do is make sure that your blog is set to ping rpc.pingomatic.com
Ping once for all: http://pingomatic.com

Keyword density, your total keyword density for one page should be between 2% and 4%
http://www.keyworddensity.com
http://tools.seobook.com/general/keyword-density/

Analyzes inbound links:
http://www.opensiteexplorer.org/

Semrush
http://www.semrush.com


Analyzer tools:

1. http://www.backlinkwatch.com
2. http://www.markosweb.com
3. http://www.woorank.com

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Google

• AdSense
• AdWords
• Analytics
• AdWordsTool Keyword generatorhttps://adwords.google.com/select/KeywordToolExternal Extracts keywords from your web site to compare them with the list of the most searched keywords on the internet.
• Gmail
• Google Insights for Search
• Google Webmasters Tools
• GoogleTrends