When we’re thinking about SEO tools, we often lose sight of something very basic: a lot of us just can’t afford to pay for expensive software. Maybe you’re trying to grow an agency business on the cheap. Or maybe it has nothing to do with money and you just don’t want to be blasted with 50 million e-mails from software companies trying to sell you their latest product. We’ve compiled an extensive list of absolutely free SEO tools that are completely free to use with no credit card or registration required. A few of these tools (most notably some of the keyword tools) require registration if you want to extract the data to . But of course there’s nothing stopping you from copying the terms to Notepad, Text Edit or your text editor of choice.