FreePCB is a printed circuit board design program for Microsoft Windows. It allows for up to 16 copper layers, both metric and English units, and export of designs in RS-274X Gerber format. Boards can be partially or fully autorouted with the FreeRouting autorouter by using the FpcROUTE Specctra DSN file translator.
It is free software released under the terms of the GNU General Public License.
Under other operating systems
FreePCB can run under Linux by using Wine and on Macintosh computers using Parallels Desktop for Mac.
^ "FreePCB User Guide Version 1.4" (PDF) by Allan Wright