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Free Graphics Libraries

OpenSceneGraph
The OpenSceneGraph is an open source high peformance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. Written entirely in Standard C++ and OpenGL it runs on all Windows platforms, OSX, GNU/Linux, IRIX, Solaris and FreeBSD operating systems.

ImageMagick
ImageMagick is a collection of tools and libraries to read, write, and manipulate images in many formats (over 90 major formats) including popular formats like TIFF, JPEG, PNG, PDF, PhotoCD, and GIF.

ImageLib: An Image Processing C++ Class Library
ImageLib is a C++ class library providing image processing and related facilities. The main set of classes provides a variety of image and vector types, with additional modules supporting scalar and vector quantisation, wavelet transforms, DCT transforms, and simple histogram operations.

Visualization ToolKit (VTK)
The Visualization ToolKit (VTK) is an open source, freely available software system for 3D computer graphics, image processing, and visualization. VTK consists of a C++ class library, and several interpreted interface layers including Tcl/Tk, Java, and Python.

GraphicsMagick
GraphicsMagick is a robust collection of tools and libraries which support reading, writing, and manipulating an image in over 88 major formats including popular formats like TIFF, JPEG, JPEG-2000, PNG, PDF, PhotoCD, SVG, and GIF. GraphicsMagick supports creating new images on the fly, making it suitable for building dynamic Web applications.

Magick++
Magick++ is the object-oriented C++ API to the GraphicsMagick image-processing library.

The Mesa 3D Graphics Library
Mesa is a 3-D graphics library with an API which is very similar to that of OpenGL.

PNGwriter
PNGwriter is a C++ library for creating PNG images. PNGwriter is a very easy to use open source graphics library that uses PNG as its output format. The interface has been designed to be as simple and intuitive as possible.

CImg Library - C++ Template Image Processing Library
The CImg Library is a C++ toolkit providing simple classes and functions to load, save, process and display images in your own C++ code.

Open Scene Graph
The Open Scene Graph is a open source high peformance 3D graphics toolkit, used by application developers in fields such as visual simulation, games, virtual reality, scientific visualization and modelling. Written entirely in Standard C++ and OpenGL it runs on all Windows platforms, OSX, Linux, IRIX, Solaris and FreeBSD operating systems.

GD Graphics Library
GD is an open source code library for the dynamic creation of images by programmers. GD is written in C, and wrappers are available for Perl, PHP and other languages. GD creates PNG, JPEG and GIF images, among other formats. GD is commonly used to generate charts, graphics, thumbnails, and most anything else, on the fly.

g2
g2 is an easy to use, portable and powerful 2D graphics library. g2 is written in C (ANSI) and additionally has a Fortran and perl interface

Mesa 3D Graphics Library
Mesa is a 3-D graphics library with an API which is very similar to that of OpenGL.

paintlib
paintlib is a portable C++ class library for image loading, saving and manipulation.

GNU libxmi
GNU libxmi is a C/C++ function library for rasterizing 2-D vector graphics. It can draw 2-D graphical primitives, including wide polygonal lines and circular and elliptical arcs, into a user-supplied matrix of pixels

PasJPEG
PasJPEG is a collection of Turbo Pascal routines to compress and decompress JPEG files.

DISLIN
DISLIN is a high-level plotting library for displaying data as curves, polar plots, bar graphs, pie charts, 3D-color plots, surfaces, contours and maps.

Libart
Libart is a library for high-performance 2D graphics. It is currently being used as the antialiased rendering engine for the Gnome Canvas. It is also the rendering engine for Gill, the Gnome Illustration app.

libwmf
libwmf, a library to convert microsoft's wmf file format to something useful, currently bindings exist to convert them to onscreen X graphics, to the gif format and to fig.

libAfterImage
libAfterImage is a generic image manipulation library

JpegFile
Win32 class library that allows you to read JPEG files into a RGB buffer and save the buffer as a RGB file.