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http://glew.sourceforge.net/ - http://glew.sourceforge.net/
The OpenGL Extension Wrangler Library is a tool that helps C/C++ developers initialize extensions and write portable applications on Windows, Linux, Darwin, Irix, and Solaris platforms. |
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http://www.geuz.org/gl2ps/ - http://www.geuz.org/gl2ps/
C library for creating high quality vector output (primarily PostScript) from an OpenGL application. |
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GtkGLExt - http://gtkglext.sourceforge.net/
An OpenGL extension to the GTK GUI library. This site provides feature descriptions, screenshots, documentation, source, and development resources. |
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http://glfw.sourceforge.net/ - http://glfw.sourceforge.net/
Free, open source, portable framework for OpenGL application development |
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http://linas.org/gle/ - http://linas.org/gle/
Tubing and Extrusion API for drawing tubing, extrusions and sweeps using OpenGL. |