Panguin Tool by Barracuda Digital - See your website's Google organic visit data overlaid with Google's major algorithm updates and changes to easily identify the impact on your website. Technology by Barracuda Digital.
UpCity Free SEO Report Card - UpCity Free SEO Report Card is an SEO software that is essential for any business with an online presence to improve Search engine optimization.
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.
SEOmator - SEO website analysis & audit tool
SEO Minion - Chrome extension & Firefox add-on to help you with SEO
Check My Links - Highlights broken links on page