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FLTK

The Fast, Light Toolkit (FLTK, pronounced fulltick) is a cross-platform graphical user interface...

Free Open Source
Mac
Windows
Linux

The Fast, Light Toolkit (FLTK, pronounced fulltick) is a cross-platform graphical user interface (GUI) library developed by Bill Spitzak and others. Made to accommodate 3D graphics programming, it has an interface to OpenGL, but it is also suitable for general GUI programming.

Link to official FLTK site

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c-plus-plus development gui-toolkit programming

FLTK was added by mer30hamid in Feb 2013 and the latest update was made in Nov 2017. The list of alternatives was updated Feb 2020. It's possible to update the information on FLTK or report it as discontinued, duplicated or spam.

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