Competitive Heatmap Analysis - Any website's heatmap data is at your fingertips
heatmap.js - Dynamic Real-time Heatmaps for the Web
66Analytics - Self-hosted analytics, heatmaps & session recordings.
Unspam.email - Email spam checker and newsletter heatmap prediction.
BestTime API - Forecast popular times of public businesses +analytics
brainsight - Brainsight predicts attention of your target group, without testing actual people, with 94% accuracy.