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  GNS3

  GNS3 is a graphical network simulator that allows you to design complex network topologies. You may run simulations or configure devices ranging from simple workstations to powerful Cisco routers. It is based on Dynamips, Pemu/Qemu and Dynagen.

  27,386 weekly downloads
• Enterprise
  Dia Diagram Editor

  Draw flowcharts and more with more than 1000 readymade symbols

  20,693 weekly downloads
• Enterprise
  ProjectLibre Project Management Software

  ProjectLibre is the open source alternative to Microsoft Project

  7,765 weekly downloads
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  MeshLab

  MeshLab, the mesh processing system for 3D scanning and printing

  6,445 weekly downloads
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  FreeImage

  FreeImage is a library project for developers who would like to support popular graphics image formats (PNG, JPEG, TIFF, BMP and others). Some highlights are: extremely simple in use, not limited to the local PC (unique FreeImageIO) and Plugin driven!

  5,764 weekly downloads
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  LibreCAD

  LibreCAD Open Source 2D-CAD

  4,877 weekly downloads
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  Quite Universal Circuit Simulator

  Qucs is a circuit simulator with graphical user interface. The software aims to support all kinds of circuit simulation types, e.g. DC, AC, S-parameter, Transient, Noise and Harmonic Balance analysis. Pure digital simulations are also supported.

  3,357 weekly downloads
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  G'MIC

  A full-featured image processing framework.

  2,409 weekly downloads
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  VPython-wx

  VPython is an easy-to-use 3D graphics module for Python.

  4,160 weekly downloads
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  TinyCAD

  TinyCAD is a program for drawing circuit diagrams commonly known as schematic drawings. It supports standard and custom symbol libraries. It supports PCB layout programs with several netlist formats and can also produce SPICE simulation netlists.

  1,618 weekly downloads
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  AnalysePlugin

  AnalysePlugin will help you to search for more than one search pattern at a time. It is a plugin for NotePad++.

  1,965 weekly downloads
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  wxMaxima

  wxMaxima is a cross-platform graphical front-end for the computer algebra system Maxima based on wxWidgets. It provides nice display of mathematical output and easy access to Maxima functions through menus and dialogs.

  1,060 weekly downloads
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  OpenDocMan

  PHP Document Management System (DMS)

  690 weekly downloads
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  FidoCadJ

  Simple and intuitive 2D vector drawing for electronics and not only.

  606 weekly downloads
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  ScadaBR

  ScadaBR is a SCADA (Supervisory Control and Data Acquisition) system with applications in Process Control and Automation, being developed and distributed using the open source model.

  886 weekly downloads
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  QP actor frameworks and QM modeling tool

  Event-driven, RTOS-like, active object frameworks for microcontrollers

  696 weekly downloads
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  OpenOCD - Open On-Chip Debugger

  The Open On-Chip Debugger

  931 weekly downloads
• Enterprise
  TWiki Collaboration Platform

  Open Source Enterprise Wiki and Web Application Platform

  637 weekly downloads
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  Elmer finite element software

  Elmer is a finite element software for numerical solution of partial differential equations and multiphysical problems. It includes models of structural mechanics, fluid dynamics, heat transfer, electromagnetics etc. Elmer home is www.csc.fi/elmer

  484 weekly downloads
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  Open Grid Analysis and Display System

  OpenGrADS provides extensions and interfaces for GrADS.

  458 weekly downloads
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  PyCAM

  Open Source CAM - Toolpath Generation for 3-Axis CNC machining

  494 weekly downloads
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  ONVIF Device Manager

  Network video device management software

  488 weekly downloads
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  MCU 8051 IDE

  Integrated Development Environment for some microcontrollers based on 8051(e.g. AT89S8253). Supported languages are Assembly and C. It has its own simulator, assembler, editor and many other tools. See http://mcu8051ide.sf.net for more details.

  524 weekly downloads
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  Logic Gate Simulator

  Logic Gate Simulator is an open-source tool for experimenting with and learning about logic gates. Features include drag-and-drop gate layout and wiring, and user created "integrated circuits".

  442 weekly downloads
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  STL for Sketchup

  An STL format importer/exporter plugin script for Google SketchUp. Supports both binary and ASCII import and export.

  622 weekly downloads

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