iCircuit - Its advanced simulation engine can handle both analog and digital circuits and features realtime...
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Altium Designer - PCB Design Software
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
LTspice - LTspice® is a high performance SPICE simulation software, schematic capture and waveform viewer with enhancements and models for easing the simulation of analog circuits.
Osmond PCB - Design printed circuit boards software