1、Vis.js
官网：vis.js - A dynamic, browser based visualization library.
github地址：GitHub - almende/vis: Dynamic, browser-based visualization library
在github上有4000多颗星，还蛮受欢迎的；

2、JointJS
官网：JointJS - the HTML 5 JavaScript diagramming library.
github地址：GitHub - clientIO/joint: JavaScript diagramming library
在github上有1900多颗星，也不错；

3、GoJS
官网：GoJS Diagrams for JavaScript and HTML, by Northwoods Software
github地址：GitHub - NorthwoodsSoftware/GoJS: All GoJS samples, extensions, and documentation

4、Raphaël
官网：Raphaël—JavaScript Library
github地址：GitHub - DmitryBaranovskiy/raphael: JavaScript Vector Library
这个有8000多颗星。。。

5、jsPlumb
It uses SVG and runs on all browsers from IE9 and later.
官网：jsPlumb Toolkit

github地址：GitHub - sporritt/jsPlumb: Visual connectivity for webapps
这个效果还不错，星也有2000多。

6、JTopo
这个是国产滴，看上去效果也还行
官网：jTopo