SEO Tools-Keyword Research
Excellent keyword research is the foundation upon which all Search Engine Optimization is built. There are many tools to help you with this important task.
Professional Keyword Research Tools
The cost of these programs may be prohibitive for occasional users. However, most offer free trials and others allow you to subscribe for time periods as short as a week.
Wordtracker - free trial
Keyword Discovery - free trial
NicheBot - a suite of online marketing tools that includes Wordtracker.
Marketo - free trial
WebCEO - free and paid versions
Free Keyword Tools
There are also free online keyword tools that may suit your needs:
This does not give actual numbers, but shows relative graphs. It’s useful for gaining quick insight into the traffic patterns and amount of competition for a particular keyword within Google AdWords.
Another tool that lacks numbers of searchers, this is useful for seeing seasonal trends in search traffic in Google.
SEO Tools - Keyword Suggestions for Google
Designed to assist you in choosing terms for Google.
SEO Toolset’s free program allows you to enter a URL and get suggestions for keywords to target.
This was one of the first keyword tools and enjoyed immense popularity for many years. However, its database has not been updated recently and it should only be used as a general guideline.