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Wordtracker.com (Free and Paid Version)
http://www.wordtracker.com
Wordtracker is probably one of the oldest keyword research tools around. I think
it is fairly decent for keyword research, but I find that some of the keywords
generated are not very relevant to the search term as the list grows larger.
KeywordElite.com ($174 one-time cost)
http://www.keywordelite.com
Keyword Elite is the brain-child of IM marketer Brad Callen. The tool is actually
5 tools in one with advanced features such as analyzing and spying on Adwords
competition. It is a bit pricey at $174, but this is a one-time fee for this software
tool.
KWBrowse.com (Free)
http://www.kwbrowse.com
I love this free keyword research tool because it actually supplies you with
keywords from *lateral* markets that may be related to what you are promoting.
This is important because people in related markets may also be interested in
what you are promoting or selling.
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Quintura.com (Free)
http://www.quintura.com
Quintura is a visual search engine that is similar to KWBrowse.com. What makes
Quintura different than other search engines is that it builds a cloud of similar
keywords and keyword phrases in lateral markets.
SpyFu.com (Free and Paid version)
http://www.spyfu.com
SpyFu is another one of those “steal your competitor’s” keyword tools. With a
wealth of information on millions of keywords, you can easily find the keywords
from your organic and paid competitors and start adding them to your arsenal of
traffic generating keywords. They have a limited free version with an option to
upgrade for full membership at about $279 annually.
WordButler (Free trial then $19.95/month)
http://www.wordbutler.com
I know the guys behind Word Butler and they are very smart. This keyword tool
uses their unique HCE (Human Cognition Emulator) algorithm, which simply
means you get as many related keyword groups