PKP.in

Keyword Selector Tool (How many times that term was searched on the net last month) (Ovt or Overture tool)

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

Most popular searches of the month, in the U.S. and abroad on Google.

http://www.google.com/press/zeitgeist_monthly.html

Top searched keywords on Google International

http://www.google.com/press/intl-zeitgeist.html

Google adwords keyword tool

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

Keyword Discovery

http://www.nichebot.com/

View Max Bids and listings for a search term.(Yahoo network)http://uv.bidtool.overture.com/d/search/tools/bidtool/

CPC (cost per click) advertising ROI (return on investment) Calculator tool

http://searchmarketing.yahoo.com/rc/srch/tools/roic.php

CPM (cost per thousand) impressions advertising ROI (return on investment) Calculator

http://searchmarketing.yahoo.com/rc/srch/tools/roasc.php

100 Top Paying Keywords

http://7search.com/scripts/searchterms/top_paying.asp?n=100

Free search engine submission

http://www.submitexpress.com/submit.html

Yahoo search engine free submission

http://search.yahoo.com/info/submit.html

Keyword Suggestion Tool

http://www.selfseo.com/keyword_suggestion_tool.php

Google keyword suggestions

http://www.google.com/webhp?complete=1&hl=en

Google Adsense formats view WYSIWYG

https://www.google.com/adsense/adformats?sourceid=asos&subid=ww-ww-et-resource_box&medium=link

Top search terms driving traffic to the sites in a particular category.

http://www.keyworddiscovery.com/directory/Top.html

Keyword typo generator & Ebay misspellings tool

http://www.selfseo.com/keyword_typo_generator.php?PHPSESSID=amsoujre5db3e652crfg3uctf1

Pay Per Click Search Engine Top Bid Analyzer

http://www.virtualpromote.com/tools/top-ppc-bids/

Keyword Density Analyzer

http://www.virtualpromote.com/tools/keyword-analyzer/