There are a lot of keyword research tools - both free and paid - out there. Arguably the best known of the paid tools are Keyword Discovery and Wordtracker. Some of the most used free tools include the Google AdWords Keyword Tool and the search suggestion tools offered by Google, Yahoo and Bing (start entering your search term, and you’ll see a list of suggested searches in a drop-down list).
I’d like to compile a list of keyword research tools and services and ask for your opinions on which work best for you and why. So here’s a few to get started. If you use different tools add them to our list using the comment form. If you use any of the tools below to conduct your keyword research let us know what you think.
- Wordtracker - http://www.wordtracker.com
- Keyword Discovery - http://www.keyworddiscovery.com
- Google Adwords Keyword Tool - https://adwords.google.com/select/KeywordToolExternal
- Google Insights for Search - http://www.google.com/insights/search/
- Yahoo/Google/Bing search suggestion tools
- Google Search Based Keyword Tool - http://www.google.com/sktool/
- Wordstream - http://www.wordstream.com/
- Wordz - http://www.wordze.com/
- Keyword Spy - http://www.keywordspy.com/
- SEO Book Keyword Tools - http://tools.seobook.com/keyword-tools/seobook/
- NicheBot - http://www.nichebotclassic.com/
Want to comment on any of the services above, or add another tool to the list? Let us know using the comment field below.
Tags: Keyword Research, keywords

Patrick Murphy
November 3, 2009
There is another tool, Hubspot which is also an inbound marketing tool
Thanks
Patrick