

Yahoo site explorer is long gone and now Google has made moves to hide keyword data. Things have definitely changed a lot since then.

Google keyword tool was the top keyword research tool because it provided data straight from Google. Yahoo site explorer was an awesome backlink tool and provided a ton of backlink data.

I started doing SEO around 2005 or so and back then, it was pretty easy. Feel free to suggest any tools that I missed in the comments below. The original post contained around 60 keyword tools and ideas, but the updated post now contains over 100. Update: With some contributions from the SEO/SEM Group on LinkedIn, there are now over 80 tools and ideas on this list.
