Develop desktop GUI applications using PHP, HTML5, JavaScript
C++ Functional Terminal User Interface
Lighter, faster browser kernel of blink to integrate HTML UI in apps
Powerful utility for keyboard customization
A wxWidgets GUI Builder
Graphical User Interface Toolkit for Python with minimal dependencies
Swift interface to the optimized facebook/yoga flexbox implementation
A fast and easy-to-use status bar
Node canvas is a Cairo backed Canvas implementation for NodeJS
Cross-platform layout engine which implements Flexbox
A library to extend default SFML to create GUI much easier.
Dynamic Extension for TCL/TK
a dll to easily make gui windows with graphics in any language
A small C library for building user interfaces with C, XML and CSS.
GTK+iostream, Data plots, ORB, Neural Networks, WSOLA
PHP bindings for the cross-platform GUI library wxWidgets.
Simple widget classes for C++ development
Rich HTML UI engine for UE4