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  Inkscape

  A Linux, Windows & OSX vector graphics editor (SVG format) featuring transparency, gradients, node editing, pattern fills, PNG export, and more. Aiming for capabilities similar to Illustrator, CorelDraw, Visio, etc.

  84,180 weekly downloads
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  Stellarium

  A realistic, real-time 3D simulation of the night sky.

  34,687 weekly downloads
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  OpenCV

  Open Source Computer Vision Library

  34,463 weekly downloads
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  matplotlib

  Matplotlib is a python library for making publication quality plots using a syntax familiar to MATLAB users. Matplotlib uses numpy for numerics. Output formats include PDF, Postscript, SVG, and PNG, as well as screen display.

  14,408 weekly downloads
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  gnuplot development

  Famous scientific plotting package.

  7,601 weekly downloads
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  Hugin

  Panorama stitching and more. A powerful software package for creation and processing of panoramic images.

  7,330 weekly downloads
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  Celestia

  Real-time 3D visualization of space

  5,275 weekly downloads
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  gretl

  GNU Regression, Econometrics and Time-series Library

  5,319 weekly downloads
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  The OpenGL Extension Wrangler Library

  The OpenGL Extension Wrangler Library is a simple tool that helps C/C++ developers initialize extensions and write portable applications. GLEW currently supports a variety of operating systems, including Windows, Linux, Darwin, Irix, and Solaris.

  4,874 weekly downloads
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  Freeware Advanced Audio Coder

  FAAC is an Advanced Audio Coder (MPEG2-AAC, MPEG4-AAC). The goal of FAAC is to explore the possibilities of AAC and exceed the quality of the currently best MP3 encoders.

  3,849 weekly downloads
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  Earth3D

  Earth3D is a program to display the earth as a 3D globe (including heightfields) in real-time. One can zoom until cities become visible. It uses huge datasets that are loaded on demand over the internet. It is possible to embed dynamic data into the view

  4,001 weekly downloads
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  Sky Chart / Cartes du Ciel

  SkyChart is a software to draw chart of the night sky for the amateur astronomer from a bunch of stars and nebulae catalogs. See main web page for full download

  2,726 weekly downloads
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  mcrypt

  mcrypt, and the accompanying libmcrypt, are intended to be replacements for the old Unix crypt, except that they are under the GPL and support an ever-wider range of algorithms and modes.

  2,288 weekly downloads
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  K-3D

  K-3D is the free (as in freedom) 3d modeling, animation, and rendering system.

  1,770 weekly downloads
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  Speed Dreams : an Open Motorsport Sim

  Speed Dreams is a Motorsport Simulator featuring high-quality 3D graphics and an accurate physics engine, all targeting maximum realism. Initially forked from TORCS, it has now reached a clearly higher realism level in visual and physics simulation, thanks to its active development team and growing community. It mainly aims to implement exciting new features, cars, tracks and AI opponents to make a more enjoyable game for the player, while constantly pushing forward visual and physics realism. It is also intended for any research, study or teaching activity, around physics and AI, thanks to its GPL V2+ license, and the clear and modular architecture of its C/C++ code base.

  1,898 weekly downloads
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  BRL-CAD

  Open Source Solid Modeling CAD

  1,741 weekly downloads
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  Avogadro

  Avogadro is an advanced molecular editor designed for cross-platform use in computational chemistry, molecular modeling, bioinformatics, materials science and related areas. It offers a flexible rendering framework and a powerful plugin architecture.

  1,500 weekly downloads
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  Engauge Digitizer

  Convert graphs or map files into numbers.

  1,446 weekly downloads
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  ARToolKit

  The Augmented Reality Tool Kit (ARToolKit) captures images from video sources, optically tracks markers in the images, and composites them with computer-generated content using OpenGL. Dual-licensed, under the GPL, plus commercially by ARToolworks, Inc.

  1,395 weekly downloads
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  mp3splt

  mp3splt is a free utility to split mp3 and ogg files without decoding, selecting begin/end time; if file is an album, you can get splitpoints automatically from internet or a local cue, cddb file. It also splits Mp3Wrap and AlbumWrap archives.

  1,513 weekly downloads
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  Virastyar

  Virastyar is an spell checker for Persian Language

  1,489 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.

  1,044 weekly downloads
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  Lazarus Code and Component Repository

  Lazarus is a free and open source development tool for the Free Pascal Compiler. The purpose of this project is to serve as a Code Repository, Wiki Knowledgebase and support site for converting existing components and libraries to work with Lazarus and the Free Pascal Compiler.

  1,366 weekly downloads
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  VirtualGL

  VirtualGL redirects 3D commands from a Unix/Linux OpenGL application onto a server-side 3D graphics card and converts the rendered 3D images into a video stream with which remote clients can interact to view and control the 3D application in real time.

  1,015 weekly downloads
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  Dirac

  Dirac is a general-purpose video codec aimed at resolutions from QCIF (176x144) to HDTV (1920x1080) progressive or interlaced. It uses wavelets, motion compensation and arithmetic coding and aims to be competitive with other state of the art codecs.

  887 weekly downloads

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