FreePCB is a free, open-source PCB editor software run under Microsoft Windows OS. It was designed to be easy to learn and easy to use, yet capable of professional-quality work. It The software features including : 1 to 16 copper layers; Board size up to 60 inches by 60 inches; Uses English or metric units (i.e. mils or mm) for most functions; Design rule checker and Autosave; Footprint libraries courtesy of Ivex Design International, PCB Matrix and the IPC; Footprint Wizard and Footprint Editor for creating or modifying footprints; Copper fill areas; Imports and exports PADS-PCB netlists; Exports extended Gerber files (RS274X) and Excellon drill files.
The minus from this software is that it doesn't have built-in auto router. But don't worry, you can try web-based autorouter at freerouting.net. You need to create a .dsn-file from FreePCB and then launch the router on freerouting.net. Do some interactive routing or start the auto router in the toolbar of the board editor. After you have finished choose "Export Specctra Session File" in the file menu.
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