KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
LibrePCB - LibrePCB is a free EDA software to develop printed circuit boards.
Fritzing - Fritzing is an open-source initiative to support designers, artists, researchers and hobbyists to...
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Virtual Breadboard - It is a circuit simulator on a virtual breadboard.
Circuit Simulator - Animated electronic circuit simulator using ideal components to visualize voltage and current.