Powerful yet simple
A3 let you use all the power of D3.js while provide you a framework to encapsulate functionality in a way that is reusable.
Reusable
Designed with reusability in mind, A3 uses Angular directives to display visualizations in a way that is very intituive and highly customizable.
Modular
A3 doesn't come with built-in visualizations, every visualization reside in a different file, so you can add or remove visualizations as you need.
Extensible
Create your own visualizations or use the ones made by the comunity is as easy as adding a JavaScript file.
Super easy
You don't even need to know D3.js to use A3 it's like using regular html. Creating new visualizations is super easy too if you know D3.js.