Keyword Ideas
http://ubersuggest.org/

Generate Keyword Lists for Local Terms (Cities,Towns, States etc.)
http://www.5minutesite.com/local_keywords.php

Merge Keywords Fast & Easy
http://mergewords.com /

Keyword Wrapper
http://www.searchenginesmarketer.com/ppckeywordwrapper/

Keyword Phrase Builder
http://www.searchenginesmarketer.com/keyword-phrase-builder-tool/

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

Zip Codes by County
http://www.getzips.com/county.htm

Zip Code in a Radius
http://www.zip-codes.com/zip-code-radius-finder.asp

Cool Search Engine Aggregator
http://www.soovle.com/

Competitive Intelligence and Keyword Research
Paid with some Freemium/Free Trials

Spyfu
http://www.spyfu.com/

AdBeat
http://www.adbeat.com/

Keyword Spy
http://www.keywordspy.com/

SEMrush
http://www.semrush.com/