Fritzing

O que você acha de um programa prototipar seu projeto com o arduino? E se ele ainda  pudesse montar uma placa de circuito como se fosse o Proteus? Pois então o Fritzing faz tudo isso. Muito legal, vale dar uma conferida.

About Fritzing ( in inglesh)
Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to take the step from physical prototyping to actual product. We are creating this software in the spirit of Processing and Arduino, developing a tool that allows users to document their Arduino and other electronic-based prototypes, share them with others, teach electronics in a classroom, and to create a pcb layout for manufacturing.

Download  fritzing

sorce : http://fritzing.org/