Cobritherm :		(material specfications)
GraphiCode :	http://www.graphicode.com/	(a Gerber file viewer)
Data Electronic :	http://www.dataelectronic.com/	(PCB specification and production)
EAGLE :	http://www.cadsoft.de/	(PCB design)
OrCAD :	http://www.cadence.com/orcad	(PCB design)
UltraCAD :	http://www.ultracad.com/	(PCB design)

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