Keyword Suggestion Tools

Whether you are working on search engine optimisation or a PPC marketing campaign such as Google AdWords, knowing which search engine keywords can bring converting traffic to your site is vital. The ultimate is finding a keyword with high traffic, high conversion and low competition. Below are tools which will provide keyword data, many of them are free.

KWFinder.com
Lets you find longtail keywords with low SEO competition. Gives you keywords results without requiring a sign-up.

Google AdWords Keyword Planner
Sign up for a Google Adwords account and you get access to their Keyword Planner tools.

Wordtracker.com
Paid keyword tool which gives keyword suggestions and SEO competition data.

SEOBook Online Keyword Tool
Gives comprehensive keyword data.

The Ten Commandments of Keyword Selection at seochat.com
Article on how to choose the best keywords.

Trellian Keyword Discovery
An advanced keyword research and search term suggestion tool.

SpyFu.com
Lets you see which keywords your competitors are buying and which ones they optimize their site for.

Brainstorm It! from Site Build It!
A powerful keyword analyzer.

SeoQuake Toolbar
Gives you valuable information about your competitors' sites and tells you how much search engine keyword traffic is worth.