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
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.
KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
Ktechlab - KTechLab is an IDE for microcontrollers and electronics.