Pspice - OrCAD PSpice technology provides the best, high-performance circuit simulation to analyze and refine your circuits, components, and parameters before committing to layout and fabrication
DipTrace - DipTrace - Professional Schematic Capture and PCB Design Software
Oregano - oregano - An electrical engineering tool for GNOME
KiCad EDA - A Cross Platform and Open Source Electronics Design Automation Suite
PCBWeb - PCBWeb is a 100% free Windows desktop CAD application for designing and manufacturing electronics...
Autodesk EAGLE - Autodesk EAGLE is an electronic design automation (EDA) software.