D3.js - D3.js is a JavaScript library for manipulating documents based on data. D3 helps you bring data to life using HTML, SVG, and CSS.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
Chart.js - Easy, object oriented client side graphs for designers and developers.
Clever - syncing between education applications for K-12 schools
Google Charts - Interactive charts for browsers and mobile devices.
Claroline - Claroline is a collaborative eLearning and eWorking platform.