Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
CometCAD - Circuit schematic and layout editor program for Windows 2k, XP, Vista and 7
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Layo1 PCB - For creative PCB-designers