sharpcontrols 

Utilities for SharpControls, some SharpControls libraries use this as dependency but it can also used alone.

Handles API calls for REST.

Validation library

Financial Helpers

(Very) simple authentication framework for your C# application based on a REST API

Library to handle payments with PagSeguro

This library automatically adds the street, city, state etc. to an areacode based on informations from CEPAberto and other libraries. This is the successor of AutoCEP and should be used instead.