Online Advertising, Keyword Suggestion, SEM Tools

http://adlab.microsoft.com/alltools.aspx
http://adlab.microsoft.com/Online-Commercial-Intention/Default.aspx
http://www.google.com/trends
http://google.com/insights/search/#


Keyword Suggestion Tools:

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

http://www.gorank.com/seotools/
http://www.seocentro.com/tools/search-engines/keyword-suggestion.html
http://www.digitalpoint.com/tools/suggestion/?keywords
http://www.gorank.com/seotools/ontology/

Competitor Analysis Tools: http://www.compete.com/