cad

• kicad-share/
• ngspice/

• abc system for sequential logic synthesis and verification
• coil64 inductance coil calculator
• dxf2gcode tool to convert 2D (dxf, pdf, ps) files to gcode
• fritzing interactive electronics designing software
• geda-gaf suite of tools for electronic design automation
• gerbv viewer for Gerber (RS-274X) files
• gnucap Gnu Circuit Analysis Package
• graywolf placement tool used in VLSI design
• gtkwave GTK+-based electronic waveform viewer
• kicad schematic and PCB editing software
• lepton-eda lepton electronic design automation suite
• librecad 2D CAD program
• magic interactive system for VLSI circuit layouts
• necpp NEC2++ antenna simulator
• netgen tool for netlist comparison (LVS) and format manipulation
• opencascade platform for 3D CAD, CAM, and CAE
• openscad the programmer's solid 3D CAD modeller
• opensta Parallax Static Timing Analyzer
• pcb printed circuit board layout tool
• pcb2gcode tool for isolation, routing, and drilling of PCBs
• prusaslicer g-code generator for 3D printers
• qcad Qt-based 2D CAD system
• qelectrotech electric diagrams drawing tool
• qflow full end-to-end digital synthesis flow for VLSI ASIC designs
• qrouter multi-level, over-the-cell maze router for VLSI design
• solvespace parametric 2D/3D CAD program
• tkgate Tcl/Tk based digital circuit editor and simulator
• xcircuit circuit drawing and schematic capture
• xnecview NEC2 antenna simulator visualizer
• xschem hierarchical schematic capture program
• xtrkcad CAD program for designing model railroad layouts
• yosys framework for Verilog RTL synthesis