Email Meter - See how many emails your team deals with to understand their workload. Know how long they take to reply and where they can improve.
SEOmator - SEO website analysis & audit tool
PixelBlock - Block email open tracking inside of Gmail
Seolyzer - Seolyzer is the ultimate SEO tool that provides you with all the information you need to improve your website’s health and performance.
Ugly Email for FireFox - Get back your email privacy, block email tracking
Whatsmyserp - Powerful Rank & Serp Tracking. Completely Free.