Gerbv is an open source Gerber file (RS-274X only) viewer. Gerbv lets you load several files on top of each other, do measurements on the displayed image, etc. Besides viewing Gerbers, you may also view Excellon drill files as well as pick-place file
Ngspice project aims to improve the spice3f5 circuit simulator.
PCB is a tool for the layout of printed circuit boards. PCB can produce industry standard RS-274X and Excellon NC-Drill format output for submission to board manufacturers.
KTechlab is an IDE for microcontrollers and electronics.
A graphical Finite State Machine (FSM) designer.
A graphical tool for designing finite state machines and exporting them to Hardware Description Languages, such as VHDL, AHDL, Verilog, or Ragel/SMC files for C, C++, Objective-C, Java, Python, PHP, Perl, Lua code generation.
UrJTAG aims to create an enhanced, modern tool for communicating over JTAG with flash chips, CPUs, and many more. It is a descendant of the popular openwince JTAG tools with a lot of additional features and enhancements.
GNUSim8085 is a simulator and assembler for the Intel 8085 Microprocessor. For downloading latest release please head to the website - https://gnusim8085.github.io/ For source code - https://github.com/GNUSim8085/GNUSim8085
Icarus Verilog is an open source Verilog compiler that supports the IEEE-1364 Verilog HDL including IEEE1364-2005 plus extensions.
gputils is a collection of tools for Microchip PIC microcontrollers. Its goal is to be fully compatible with Microchip's tools, MPASM, MPLINK, and MPLIB.
JMCAD is an program for the modeling and simulation of complex dynamic systems. This includes the ability to construct and simulate block diagrams. The visual block diagram interface offers a simple method for constructing, modifying and maintaining complex system models. The simulation engine provides fast and accurate solutions for linear, nonlinear, continuous time, discrete time, time varying and hybrid system designs. With JMCAD, users can quickly develop software or "virtual" prototypes of systems or processes to demonstrate their behavior prior to building physical prototypes. The user builds his system model by selecting predefined blocks from a block library and simply wiring the blocks together. Each block of the diagram performs a function. Users can also create custom blocks in Java and add them to the JMCAD block library. JMCAD is a block diagram language for creating complex nonlinear dynamic systems.
gpsim is an open sourced simulator for Microchip's PIC microcontrollers. It supports all three families of PICs: 12-bit, 14-bit, and 16-bit cores. See also gputils http://gputils.sourceforge.net/
ADMS is a code generator that converts electrical compact device models specified in high-level description language into ready-to-compile c code for the API of spice simulators. Repository migrated to: https://github.com/Qucs/ADMS For checkout do: git clone https://github.com/Qucs/ADMS.git
A Binary Decision Diagram library, with : many highly efficient vectorized BDD operations, dynamic variable reordering, automated garbage collection, a C++ interface with automatic reference counting, and much more.
MATRIX 1.4 Free & Open Audio Power Amplifier Technology Platform
Development Project of Free & Open Audio Power Amplifier Core Circuit System - based MATRIX 1.4 Platform. MATRIX 1.4 discovered by HERU HIMAWAN TEJO LAKSONO & MUJIONO IRKHAS from Indonesia. MATRIX 1.4 is free & open technology developed & released under the therms of GNU General Public License V. 3 (GPL3).
Gaphor is a UML modeling environment written in Python. Gaphor will be small and very extensible. The repository is located at http://github.com/amolenaar/gaphor.
The KontrollerLab is an IDE for developing software for Atmel(r) AVR(c) microcontrollers using the avr-gcc compiler, the uisp and the avrdude upload software.
The project development has been moved on GitHub https://github.com/pcb2gcode/pcb2gcode The GUI for pcb2gcode can be found here https://github.com/pcb2gcode/pcb2gcodeGUI pcb2gcode is a command-line tool for isolation, routing and drilling of PCBs that provides full support for both single- and double-sided boards. For more information, see http://sourceforge.net/apps/mediawiki/pcb2gcode/
QSapecNG is a Qt-based symbolic analysis program for linear analog circuits. In fact, it consists of two indipendently parts: the SapecNG framework engine, and the application gui QSapecNG.
SPICE netlist visualizer
NetlistViewer is a tool capable of loading netlists in text format (currently only SPICE netlists) and convert them in a schematic (i..e graphical) form.
The Boolean Expression Reducer provides the user with various tools to visualize and analyze boolean expressions. Given an expression, it also reduces it to its Sum of Products and Product of Sums form.
The ASCO project aims to bring circuit optimization capabilities to existing SPICE simulators using a high-performance parallel differential evolution (DE) optimization algorithm. It supports Eldo, HSPICE, LTspice, Spectre, and Qucs.
TkGate is a event driven digital circuit simulator with a tcl/tk-based graphical editor. TkGate supports a wide range of primitive circuit elements as well as user-defined modules for hierarchical design.
AUDio MEasurement System - multi-platfrom system for audio measurement through sound card in the PC. Incorporates Generator, Oscilloscope, FFT, Sweep frequency characteristic. Now it can be compiled and works under MSWindows and Linux.
An automatic 2D Delaunay mesh generator and solver for Finite Element Analysis. Can solve 2D field problems (Poisson and Helmholtz Equations). Can use LAPACK/ARPACK solvers producing OpenGL/Postscript output. Uses C/GTK/GTKGLExt/MFC. Runs on Win32/Unix.
cascade is a tool for analyzing the noise and distortion performance for a cascaded system such as the receive path of an RF receiver. The tool is very easy to use and provides a per stage performance summary, a ranking of which elements limit system p