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
FidoCADJ - FidoCadJ is a free user-friendly vector graphic editor for Mac OS X, Linux, Windows and Android.
Solve Elec - Solve Elec is a free educational program to draw and analyze electrical circuits.
XCircuit - XCircuit: Home Page
Oregano - oregano - An electrical engineering tool for GNOME
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.