joao2391 

A package that helps you to scrap web pages. It shows you a lot of information about the page.

It is a library that helps you to get a CEP or Address.

Gang of Four Pattern Templates

It is a library that helps you to track your objects in Correios

This lib helps you to create a class at runtime from a JSON. It means that you don't need to change your class every time a JSON that you consume has changed.