PCB Design and Fabrication - Provides price quotes for circuit board manufacturing; lists circuit board (PCB) and semiconductor companies, and includes general design guidelines for circuit boards. - http://www.pcbdesignandfab.com/
PCBindia - Printed circuit board manufacturers in India. - http://www.pcbindia.com
PCB Cafe - Directory of PCB design tools, designers, manufacturers, and jobs. - http://www.pcbcafe.com/