a free library providing windowing and widgets for graphics APIs / engines where such functionality is not natively available, or severely lacking. The library is object orientated, written in C++, and targeted at games developers who should be spending t
Hardware accelerated 2D full featured middleware for all who want to develop commercial quality 2D games rapidly and easily. It covers all imaginable 2D game genres (DirectX)
a high-level multi-platform, thread-safe C/C++ windowing and graphics library built upon a fast, low-level graphics kernel. (new feature is FGX - dynamic GUI via XML file aka XUI file format)
C++ interface for the popular GUI library GTK+. Highlights include typesafe callbacks, widgets extensible via inheritance and a comprehensive set of widgets.
a multi-platform C++ GUI toolkit. It is a product of Troll Tech. It is supported on all major variants of Microsoft Windows and Unix/X Windows. (BEWARE OF THE LICENSE)
Dialog Manager Library, using SDL and FreeType2. Written in C++ (with extensive use of the Standard Library and STL) the intention is to leave all of the antiquated C paradigms out of it (like #defines).
G-Inspector, a tool visualizing internal data structures of Gtk+ application, and Grift, a library which enables separate description between core logic and the user interface in an application software.
a free user interface builder for GTK+ and GNOME, using libglade, Glade XML files can be used in numerous programming languages including C, C++, Java, Perl, Python, C#, Pike, Ruby, Haskell, Objective Caml and Scheme. Adding support for other languages is
(pronounced "fulltick") is a cross-platform C++ GUI toolkit for UNIX®/Linux® (X11), Microsoft® Windows®, and MacOS® X. FLTK provides modern GUI functionality without the bloat and supports 3D graphics via OpenGL® and its built-in GLUT emulation.
a free user interface builder for GTK+ and GNOME interfaces designed are saved as XML, and by using the libglade library these can be loaded by applications dynamically as needed. (Glade can also generate C code)
Distributed Multiplatform Framework. Component based programming framework, using various repositories. The samples are implemented either in console or wxWidgets