You know it had to be one of the first recommendations I make – it’s for the comprehensive list of free (and some not-free) SEO tools available at SEOBook.com.
Their page summarizes keyword tools under these categories:
- Traditional Keyword Suggestion Tools
- Keyword Valuation Tools
- Keyword Extensions
- More Abstract Keyword Sources
- Trend Related Keywords
- Bulk Keyword Editing Tools
- Keyword Modifiers
- Background Information on Keywords
I’ll leave it to you to read the full list of resources, but many of the items here are among the most used in my Bookmarks.
