Middleware with a high level of abstraction of the graphic system.
Simple widget classes for C++ development
Widgets library contains c++ classes of GUI widgets for WinAPI.
Minimalistic properties editor for Qt applications
Qt Slide Switch Button Component
A GUI based on libSDL for C++ applications
OpenGL GUI and build-in data management API
3D Web UI, Embed Web and Flash in 3D Games, based on WebKit
A C++ library to easily create GUI-editable objects
Image viewer for animated GIFs