Kivy is an open-source Python framework used for developing multi-touch applications with a natural user interface (NUI). It is cross-platform, meaning developers can write a single codebase and run it on Windows, macOS, Linux, iOS, Android, and Raspberry Pi. Kivy is particularly popular for mobile and touch-based applications, making it a great choice for GUI (Graphical User Interface) and app development.
Kivy has a declarative language called KV, which allows developers to separate UI design from application logic, similar to HTML/CSS for web development. And it uses OpenGL ES 2 for rendering, ensuring smooth graphics performance for animations and complex UI elements.