wxWidgets

wxWidgets is a software library that helps developers create applications with user interfaces that work consistently across different operating systems like Windows, macOS, and Linux. It provides a set of tools and components—such as buttons, windows, and menus—that look and behave naturally on each platform. This means developers can write their code once and have it run smoothly on multiple systems without needing to redesign the interface for each one. Essentially, wxWidgets streamlines cross-platform development, allowing applications to deliver a native feel regardless of the operating system.