Great Tools for Creating Longtail Keyword Lists
Here are some useful tools for generating longtail keywords for your SEM or Adsense campaign.
Combine Keywords
This tool allows you to enter three lists of words and the tool will combine the lists into every possible phrase using those words.
Local Keywords List
This tool is similar to Combine Keywords except it only allows you to enter one list, which it combines with a list of city or state names. One cool feature is how it allows you to select cities: Once you enter a zip code and a distance (number of miles) from that zip code, the tool will generate a list of cities within that geographic area (circumference).
AdWords Wrapper
The Google AdWords Wrapper is a FREE time saving tool that wraps keyword phrases in “quotation marks” (phrase match) and [square brackets] (exact match) for use in Google AdWords campaigns.
For tools that generate keywords that are related to a single topic, among other things, check out the keyword tools here and here.