to design circuits, as well as so called "layouts", be it PCB or stripboard or breadboard... very-very handy a tool, very complex but very simple to use...
Paid • Open Source
What is Fritzing?
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.