Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.
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.
SEOmator - SEO website analysis & audit tool
Internet Marketing Ninjas - Internet Marketing Ninjas provides an SEO tool that offers extensive information related to your site’s health and well-being.
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.
Sonatype Nexus Lifecycle - Sonatype Nexus Lifecycle is a software repository and composition analysis tool that helps developers and operations teams keep track of all the software components in their applications and systems.