5 Free And Open Source Software For PCBs

1. PCB 

Download Link: http://sourceforge.net/projects/pcb/files/latest/download?source=files

Supported OS: Windows,linux,MAC

License: Freeware

PCB is an interactive printed circuit board editor for Unix, Linux, Windows, and Mac systems. PCB includes a rats nest feature and schematic/netlist import, design rule checking, and can provide industry standard RS-274X (Gerber), NC drill, and centroid data (X-Y data) output for use in the board fabrication and assembly process, as well as photorealistic and design review images.

2. Fido CadJ 

Download Link: http://sourceforge.net/projects/fidocadj/files/latest/download

Supported OS: Windows, Linux, Mac OSX

License: GPL

FidoCadJ is an easy to use graphical editor, with a library of electrical symbols and footprints. It aims to be an agile and effective small EDA tool for hobbyists.

3. Gerb 

Download Link: http://geda.seul.org/dist/gerbv-2.6.0.tar.gz 

Supported OS: Linux, Windows

License: GPL

Gerbv is a viewer for Gerber RS-274X files, Excellon drill files, and CSV pick-and-place files.

4. PHDL

Download Link: http://sourceforge.net/projects/phdl/files/latest/download?source=directory

Supported OS: Windows

License: GPL

An HDL alternative to PCB graphical schematic capture tools.

5. Qautoroute

Download Link: http://sourceforge.net/projects/qautorouter/files/latest/download

Supported OS: Windows

License: GPL