Qt is a comprehensive application and UI framework for developing Windows applications that can also be deployed across many other desktop and embedded operating systems without rewriting the source code. Use the code from one single code-base and rebuild for all supported Windows versions and other platforms.
The Qt class library includes all the functionality needed to build advanced GUI applications.
Qt includes a set of integrated development tools to speed development on the Windows platform.
Qt Creator is a complete Cross-platform IDE included in the Qt SDK. The IDE allows programmers to create, build, debug and run Qt applications accross all supported platforms.
The Qt Visual Studio Add-in allows programmers to create, build, debug and run Qt applications from within Microsoft Visual Studio 2005, 2008 and 2010. The add-in contains project wizards, Qt project import/export support, integrated Qt resource manager and automated build setup for the Qt Meta-Object Compiler, User Interface Compiler, and Resource Compiler.
Additional Cross-Platform and Platform-Specific Development information.