Learning seo online!

http://www.rankpay.com/

check your keywords ranking in google,yahoo.

http://www.seoserp.com/web_tools/yahoo_top_1000_serps_checker.asp

check your keyword ranking in yahoo  (1000_serps_checker)

http://www.trafficzap.com/keydensity.php

check your keywords density

http://www.seoserp.com/google_page_rank/1000_serp.asp

check your keywords ranking in google (1000 ones)

http://websitegrader.com/#ReportTop

check your website seo grader

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

keyword select tool

http://www.bluebacklinks.com

backlinks checker

http://www.webconfs.com/search-engine-spider-simulator.php

search engine spider simulator