GerbMagic 

A free Viewer for Gerber RS274x and Protel ASCII PCB files. Converts Gerber RS274x and Protel ASCII PCB to PostScript, PDF, TIFF, BMP, RID formats. High resolution Software RIP(Up to 30,000 DPI).
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DipTrace 

DipTrace is an advanced PCB design software application that comes with PCB Layout module, powerful auto-router, Schematic Capture and Component/Pattern editors to design your own component libraries.
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DipTrace Free 

DipTrace is an advanced PCB design software application that comes with PCB Layout module, powerful auto-router, Schematic Capture and Component/Pattern editors to design your own component libraries.
pcb ecad eda pcb layout electronics schematic capture pcb software pcb design software