KiCad - A Cross Platform and Open Source Electronics Design Automation Suite
3D Ripper DX - With 3D Ripper DX you can:
Proteus PCB design - Proteus PCB design combines the schematic capture and ARES PCB layout programs to provide a...
Borderless Gaming - Play your favorite games in a borderless window; no more time consuming alt-tabs.
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.
3D Analyze - With the help of 3DA you can change different graphic options under DirectX 8 and OpenGL.