fltk

Cross-platform C++ graphical user interface toolkit

The Fast Light ToolKit ("FLTK", pronounced "fulltick") is a LGPL'd C++ graphical user interface for X11. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL and its built-in GLUT emulation. FLTK is designed to be small and modular enough to be statically linked, but works fine as a shared library. FLTK also includes an excellent UI builder called FLUID that can be used to create applications in minutes.