Fritzing is open-source ... and educational starter and upgrade kits. Virtonics Arduino Simulator is one of the alternatives that comes packed with features and can be accessed by both beginners ...

[Allan Schwartz] decided to document his experience using Fritzing to design, fabricate, and test a custom Arduino shield PCB, and his step-by-step documentation makes the workflow very clear.

but that doesn’t mean you still can’t abuse Fritzing to make it do what you want. [Arduino Enigma] recently posted a tutorial on how to design custom PCB shapes for Fritzing. Yes, Fritzing is ...

I have been trying Fritzing, the free schematic capture and pcb layout tool ... To try it out, I designing a pcb for interfacing an Arduino to two robot motors (scroll down here for original design), ...