Originally Posted by trafficwise
Andy, I'm sorry to say this, but the only tool that really deserves to be on that Top 15 free seo tools list is Google Analytics, period.
1. Best free backlink checker - SEO Spyglass. Doesn't ask you for a credit card upfront like SEOmoz and the free version never expires!
2. Best free keyword research tool - Google Adwords Keyword tool. Free forever and for all.
3. Best free comprehensive SEO software for WordPress - All-in-one SEO Pack for Wordpress. Open source software
4. Best Free analytics tool - Google Analytics (has already been mentioned).
5. Best Free blogging tool - Zemanta.
Quality, not quantity.
Everyone has a right for their own opinion and I certainly respect that. But there are plenty of reasons why not to use any of Google's tools.
In addition to that, I love that there are other possibilities and alternatives.