# README - Fast Light Tool Kit (FLTK) Version 1.4.0 ** This FLTK repository is now our official source code repository. ** ## WHAT IS FLTK? The Fast Light Tool Kit ("FLTK", pronounced "fulltick") is a a cross-platform C++ GUI toolkit for UNIX(r)/Linux(r) (X11), Microsoft(r) Windows(r), and MacOS(r) X. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL(r) and its built-in GLUT emulation. It was originally developed by Mr. Bill Spitzak and is currently maintained by a small group of developers across the world with a central repository in the US. For more information see file README.