CompeteShark - Real-time competitive intelligence software for SMBs
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.
Accordably - Competitor monitoring made easy.
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.
Apptopia - Apptopia provides app store downloads, revenue, and SDK data for every mobile app & every publisher in the world
SendView - The best way to track your competitors' email marketing.