CanvasJS - HTML5 JavaScript, jQuery, Angular, React Charts for Data Visualization
Open Peeps - A hand-drawn illustration library.
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.
Control Illustrations - 108 free flat illustrations with customizable characters
RAWGraphs - RAWGraphs is an open source app built with the goal of making the visualization of complex data...
Craftwork - A collection of User Interface resources made by Craftwork