Alliance CAD

Developed at the Pierre et Marie Currie University, Alliance CAD includes a VHDL compiler, simulator, logic synthesis tools, and automatic place and route tools. Additionally, a complete set of CMOS libraries is provided. Used for such projects as the 875,000 transistor StaCS super scalar microprocessor and the 400,000 transistor IEEE Gigabit HSL Router, the Alliance CAD package is the most mature EDA Open Source software available today.

Icarus Verilog

Developed by Steve Williams, Icarus Verilog is a command line Verilog compiler for logic simulation and synthesis.

The gEDA Suite

The gEDA project is working on producing a full GPL'd suite of Electronic Design Automation tools. These tools are used for electrical circuit design, schematic capture, simulation, prototyping, and production. Currently, the gEDA project offers a mature suite of free software applications for electronics design, including schematic capture, attribute management, bill of materials (BOM) generation, netlisting into over 20 netlist formats, analog and digital simulation, and printed circuit board (PCB) layout.

FreeHDL

FreeHDL, developed as a research project at the University of Dortmund, is a command line VHDL-93 compliant compiler capable of compiling and simulating complex VHDL designs as such as the LEON-2 Processor. It uses GTKwave as its waveform output viewer.

ReyesSoft is currently the only release available that has FreeHDL ported to OS X, Solaris, and HP-UX.

Electric

Electric is a sophisticated electrical CAD system that can handle many forms of circuit design, including: a custom IC layout (ASICs), a schematic drawing utility package, and a hardware description language specifications.

GTKwave

GTKWave is a VCD/EVCD/LXT/Synopsis '.out' format electronic waveform viewer.

PCB

PCB is an interactive printed circuit board editor for the X11 window system.

Gerbv

Gerber Viewer (gerbv) is a viewer for Gerber files which are generated from PCB CAD system and sent to PCB manufacturers as basis for the manufacturing process.

Gnucap

"Gnucap is the Gnu Circuit Analysis Package.

The primary component is a general purpose circuit simulator. It performs nonlinear dc and transient analyses, fourier analysis, and ac analysis. Spice compatible models for the MOSFET (level 1-8), BJT, and diode are included in this release.

Gnucap is not based on Spice, but some of the models have been derived from the Berkeley models.

Unlike Spice, the engine is designed to do true mixed-mode simulation. Most of the code is in place for future support of event driven analog simulation, and true multi-rate simulation.

If you are tired of Spice and want a second opinion, you want to play with the circuit and want a simulator that is interactive, you want to study the source code and want something easier to follow than Spice, or you are a researcher working on modeling and want automated model generation tools to make your job easier, try Gnucap."

NgSpice

Ngspice is a mixed-level/mixed-signal circuit simulator based on three open source software packages: Spice3f5, Cider1b1 and Xspice.

Notes:

Because of a compiler bug, we are not able to include GNUCAP for Cygwin in this release.