Pad2Pad is a free printed circuit board software offering online ordering of PCB Design .
Pad2Pad's mission is to provide easy, convenient and low-cost fabrication of custom circuit boards via the web. And to supply free easy-yet-powerful design software
Pad2Pad minimum requiments are :
Windows XP,Vista, 7, 8.1
Pentium 500MHz or higher
512 Mb RAM
290 Mb of free disk space
More details about Pad2Pad software you can find on Electronic Circuits Design website or on the manufacturer home page .