Vis.js
Vis.js is a JavaScript based visualization library.
References and Resources:
http://almende.github.io/chap-links-library/js/network/examples/example02_shapes.html
https://github.com/almende/almende.github.io
https://github.com/almende/chap-links-library
Circular Graph:
https://visjs.github.io/vis-network/examples/static/jsfiddle.b15ea0216ef71667b637c36fe50c7b639c4cf59885116d4497afcd3b86e5639a.html