wxWidgets is a C++ library that lets developers create applications for Windows, macOS, Linux, and other platforms with native look and feel and high runtime performance. It provides a set of cross-platform APIs for building graphical user interfaces (GUIs) and handling events, as well as platform-specific implementations for accessing native features and capabilities. wxWidgets supports a wide range of widgets, controls, and dialogs, allowing developers to create rich and interactive user interfaces with ease. It also provides support for internationalization, accessibility, and printing, as well as integration with third-party libraries and tools. wxWidgets applications can be compiled and run on multiple platforms with minimal modifications, saving time and effort for developers. wxWidgets is used by thousands of developers and organizations worldwide to build desktop applications for a variety of industries and use cases.