To prepare some lessons on Arduino I was looking for a solution to draw breadboard schemas. I found fritzing open-source tool really great.

The tools works on Max Os X but also many other platform. It includes many standard component libraries with arduino board and shields and standard components.

The time to be ready for using it is not really more than a minute. It exports your design is PNG, JPG, SVG. It also includes different display to create circuit schema and PCB printout. But I did not use them, preferring kicad for such things. By-the-way, this is a really great tool.