There are so many different types of SEO tools. Learning about them and stayin gcurrent on them is an endless exercise. Many of the most useful and insightful tools that dominated have become unavailable over the last decade. Here's a quick glance at the current SEO tools that I use, organized by what they do.
Long gone are the detailed kayword data that Google Analytics use to provide. Overture, which gave the volume of searches by keyword, also gone. The Cool SEO Tool was one of my long term SEO Tool favorites. It's gone. sight.