www.seonick.net

Keyword research is quite possibly the most important part of SEO. You cannot begin to plan for a campaign unless you know which phrases you are targeting, and you cannot estimate costs and returns from SEO unless you first know who you’re competing against.

moz.com

At Moz, we love using premium SEO Tools. Paid tools are essential when you need advanced features, increased limits, historical features, or professional support. For other tasks, a free tool does the trick. Here you’ll find a collection of the 100 best completely free tools, tools with both free and paid options, and free trials.