KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
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
QUCS - Qucs, briefly for Quite Universal Circuit Simulator, is an integrated circuit simulator which means you are able to setup a circuit with a graphical user interface (GUI) and simulate the large-signal, small-signal and noise behaviour of the circuit.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
Altium PCB Designer - Altium offers a top-notch, best-in-class PCB Designer to give engineers the tools they need to interlink with each side involved in the electronic design process.