heatmap.js - Dynamic Real-time Heatmaps for the Web
CanIPhish - Blend social engineering with real-world phishing simulations to train your users how to detect the most advanced threats.All in a completely self-service, fast, free and modern SaaS platform.
Unspam.email - Email spam checker and newsletter heatmap prediction.
TestSubject - Test how your email subject line displays on mobile devices.
Competitive Heatmap Analysis - Any website's heatmap data is at your fingertips
Spam Check - A free JSON API to check your email messages' spam scores