CircuitLogix - CircuitLogix electronics lab simulation provides fast, powerful schematic design and simulation in one complete program.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
EasyEDA - EasyEDA - Web-based EDA suite; runs in browser.
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Multisim - Multisim is industry standard SPICE simulation and circuit design software for analog, digital, and power electronics in education and research.
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.