Examdiff Pro - It is a simple yet powerful tool that is being used by the professional programmer and developers for the purpose of visual comparison.
Q-Stats - Get free marketing insights for every question on Quora.
Listium - Share your lists
Site Rank Data - View historical rank information of websites via time series charts.
Dynamic Web TWAIN - Browser-Based Document Scanning SDK to Rapidly Deploy Your Web Applications
HypeStat - HypeStat is free statistics and analytics service, where you can find information about every website.