wxWidgets (wix-widgets, formerly wxWindows) is a widget toolkit and tools library for creating graphical user interfaces (GUIs) for cross-platform applications.
License: Open Source
Qt Creator is a comprehensive IDE that provides an integrated environment for developing cross-platform applications with a rich feature set, including an integrated UI designer and extensive libraries. In contrast, wxWidgets is a lightweight C++ library that focuses on providing a native look and feel for applications, but lacks the full IDE capabilities and advanced features of Qt Creator.