There is a lot of confusion, especially for people who are new to FLTK, about the different FLTK versions, what they offer, and when they will be released. This article attempts to clarify matters.

Jan 3, 2011 · We recommend to use the latest stable release FLTK 1.4.4, the first entry in the table below. Only old software should use 1.3.11, and only very old software may need older versions.

FLTK provides modern GUI functionality without bloat and supports 3D graphics via OpenGL® and its built-in GLUT emulation. It was originally developed by Mr. Bill Spitzak and is currently maintained by …

Jul 20, 2025 · FLTK 2.0 (never released) This branch has never been released and is no longer being maintained. Documentation retained for historical purposes only.

FLTK is a LGPL'd C++ graphical user interface toolkit for X (UNIX®), Linux® (X11 and Wayland), macOS (aka OS X), OpenGL, and Windows (Microsoft® Windows® XP, 2000, and later). ...

FLTK Programming Manual ... Generated on Mar 10, 2025 from Git revision 8838e976a0b87279e5a98e560ed3d6ef20dc9139 by Doxygen version 1.12.0

Jan 3, 2011 · Download the source code and documentation for Fast Light Toolkit (FLTK), a cross-platform C++ graphical user interface toolkit.

FLTK 1.2 is not available any longer. Please use the latest 1.1.x release for a stable release, or 1.3.x for a stable release with UTF-8 support and other new features.

Oct 4, 2007 · FLTK provides a "tab completion" file chooser that makes it easy to choose files from large directories. This file chooser has several unique features, the major one being that the Tab key …

Dec 26, 2018 · 0 A new weekly snapshot of FLTK 1.5.x (master) is now available 2019 FLTK 1.5.x Weekly Snapshot (master) Dec 12, 2025 0 A new weekly snapshot of FLTK 1.5.x (master) is now …