kicad

The KiCad EDA Suite project aims at creating a portable, cross-platform, Free/Libre/Open-Source EDA Suite.

That is capable of schematic and printed circuit board design. The code is licensed under the terms of the GNU GPL. Tools. The suite consist of a project manager, schematic editor, netlist converter, pcb designer and a gerber viewer. Works on Linux, Windows and experimental on Mac OS X.