The Windows App SDK empowers all Windows desktop apps
Qt based cross-platform GUI proxy configuration manager
Develop desktop GUI applications using PHP, HTML5, JavaScript
GUI & console sources for Detect It Easy(DiE)
Lighter, faster browser kernel of blink to integrate HTML UI in apps
C++ Functional Terminal User Interface
Community-developed library for professional-quality creative coding
User interface for recording and managing ETW traces
Node canvas is a Cairo backed Canvas implementation for NodeJS
Graphical User Interface Toolkit for Python with minimal dependencies
Cross-platform layout engine which implements Flexbox
A free C, C++ and Fortran IDE
Window hooker to run fullscreen programs in window and much more...
inputbox password WIN OSX GTK QT Console VCPKG C# Lua R Fortran Pascal
OpenDCL — modern dialog UI for AutoLISP.
Zoomable user interface (ZUI) with file manager, file viewers and more
Use Qt write lunar calendar.
Cross Platform GUI Toolkit
An open process control and laser engraving software solution
Collection of utility functions
Cross-platform C++ desktop UI framework with XML-driven skins and Skia
Qt based GUI classes for the VXL Computer Vision Libraries
A Portable Wide-Character Terminal Output Package for C and C++