Open-source alternatives to Kivy

PySimpleGUI is a Python framework used to build graphical user interfaces. It functions as an adapter-based wrapper that maps multiple GUI toolkit APIs into a single unified interface, allowing for backend-agnostic development across tkinter, Qt, or WxPython. The project uses a layout-based UI definition system where visual hierarchies are defined via nested lists rather than coordinate-based placement. It employs an event-driven polling loop and string-based event mapping to associate interface elements with specific user actions. The framework supports cross-framework GUI design and intera

Slint is a declarative user interface framework designed for building native graphical applications across desktop, mobile, and embedded platforms. It utilizes a specialized markup language to define reactive interface components, which are then compiled into optimized machine code to ensure high performance and minimal resource consumption. By separating visual structure from application logic, the framework enables developers to create consistent interfaces that run efficiently on hardware ranging from resource-constrained microcontrollers to high-end desktop systems. The framework distingu

CustomTkinter is a Python GUI framework and library used to build modern desktop applications. It serves as a toolkit for creating cross-platform graphical interfaces with a specific focus on theme-aware components and high-resolution display support. The library provides a set of widgets based on the Tkinter framework that synchronize with operating system appearance settings. It includes a theme engine to manage light and dark modes and integrates system-level scaling to ensure visual consistency across different monitors and display densities. The toolkit covers graphical interface compos

DearPyGui is a GPU-accelerated, immediate-mode graphical user interface framework for Python. It provides a high-performance toolkit for building interactive desktop applications by leveraging native hardware-accelerated rendering backends across multiple operating systems. By utilizing an immediate-mode execution model, the library offers direct control over the rendering loop and element state, enabling the creation of responsive, dynamic interfaces. The framework distinguishes itself through its ability to handle complex, high-frequency visual updates, making it suitable for real-time data

Walk is a comprehensive framework for building native Windows desktop applications. It functions as a GUI library and Windows API wrapper, providing a toolkit of native widgets and a declarative layout system for developing high-performance user interfaces. The project is distinguished by its data-binding framework, which uses reflection and string-based property paths to synchronize data sources with interface widgets. It also provides specialized support for high-DPI interface scaling and an optimized native message loop to reduce runtime overhead. The toolkit covers a wide range of capabi

This project is a collection of implementation patterns and source code examples for building desktop applications using various Python interface libraries. It provides reference implementations and architectural patterns for multiple frameworks, including PyQt, PySide, Tkinter, Kivy, and Streamlit. The repository distinguishes itself by offering specialized examples for diverse interface types, ranging from professional desktop software and native windows to reactive web-based data dashboards and data science tools. It includes specific reference material for cross-platform UI patterns, such

Iced is a cross-platform GUI library for Rust designed for building native desktop applications. It functions as a reactive toolkit that manages application state by mapping user interactions to messages, which then trigger automatic view refreshes. The framework utilizes a rendering system that supports both hardware-accelerated GPU graphics and software backends to ensure compatibility across multiple operating systems. It implements a reactive model inspired by the Elm architecture to coordinate state updates and view reconciliation. The toolkit includes a flexible layout engine and a mod

wxWidgets is a C++ UI toolkit and cross-platform GUI framework used to develop desktop applications for Windows, macOS, and Linux. It functions as a native widget wrapper, providing an abstraction layer that maps a single set of API calls to the native interface elements of different platforms. The framework allows for the creation of native graphical user interfaces by utilizing the host operating system's own controls and APIs. This ensures that applications maintain a native look and feel across various operating systems while using a consistent codebase. Beyond interface development, the

Cordova CLI is a command-line interface that enables the development of native mobile applications using standard web technologies. It functions as a unified environment that transforms HTML, CSS, and JavaScript assets into installable binary packages for multiple mobile operating systems. By acting as a facade over platform-specific build chains, the tool automates the conversion of web-based source code into native applications. The system distinguishes itself through a modular plugin architecture that bridges web-based applications with native hardware capabilities, such as cameras and sen

Floem is a native desktop UI framework and cross-platform toolkit for building high-performance user interfaces. It functions as a reactive UI library that uses a signal-based state management system to automatically synchronize the interface with data changes via lightweight observable primitives. The framework utilizes a GPU-accelerated rendering engine to ensure visual consistency and high performance across different desktop operating systems. It features a layout engine based on flexible box and grid models to create responsive screens that adapt to various window sizes. The toolkit cov

Sun-Valley-ttk-theme is a styling library for the Tkinter toolkit that provides a modern visual aesthetic for desktop applications. It functions as a collection of design assets and configuration frameworks that update the appearance of standard interface widgets to align with contemporary design standards. The library enables dynamic switching between light and dark visual modes at runtime, allowing applications to respond to user preferences without requiring a restart. It includes utilities for automatic synchronization with system-level theme settings, ensuring consistent visual presentat

Skia is a high-performance 2D graphics rendering library used for drawing text, geometries, and images on digital surfaces. It functions as a hardware-accelerated graphics engine that offloads drawing operations to the GPU, a vector graphics processor for SVG and complex paths, and a typography engine for shaping and drawing characters with Unicode support. The project provides a cross-platform image codec for encoding and decoding standard image formats into raw pixel data across multiple operating systems. It also enables the development of user interfaces that maintain visual consistency a

Incubator-weex is a cross-platform mobile framework used to build user interfaces that run across different operating systems from a single codebase. It functions as a native UI renderer and a JavaScript native UI bridge, sending serialized UI descriptions from a JavaScript engine to native mobile components. The project includes a cross-platform UI bundler and build tool to compile source code into optimized bundles for native renderers. It also provides a UI previewer and prototyping toolset that allows for testing mobile interface pages within web browsers and on physical devices. The fra

nanogui is a native C++ toolkit for rendering interactive user interface components directly within an OpenGL graphics context. It functions as a cross-platform widget library and immediate-mode framework used to create windows, buttons, sliders, and input fields. The toolkit provides specialized capabilities for building technical interfaces, including real-time parameter control panels and custom tooling for graphics-heavy software. It ensures visual consistency across different operating systems and screen resolutions through DPI-aware coordinate scaling. The framework includes a constrai

PhotoView is a custom Android view implementation designed to display high-resolution images with native support for zoom and pan gestures. It provides a zoomable image view and a matrix controller to manage how images are scaled and translated within a mobile user interface. The library handles the detection of pinch-to-zoom and tap gestures to enable interactive image navigation. It manages the transformation matrix of the image to ensure smooth magnification and provides viewport constraints to align photo edges with screen boundaries. The project covers the broader requirements of mobile

DearPyGui is a hardware-accelerated Python GUI framework and graphics rendering engine. It operates as an immediate mode user interface system, rendering frames from scratch to ensure high performance and minimal state management for desktop applications. The project functions as a GPU-accelerated plotting library capable of rendering millions of data points with high frame rates. It also serves as a node editor toolkit for constructing interactive graph-based interfaces to manage visual data flows. The framework includes capabilities for custom 2D graphics rendering, interface theme customi

Eel is a Python HTML GUI framework designed for building desktop applications that utilize a Python backend and an HTML and JavaScript frontend. It functions as a local web server wrapper that hosts application assets and manages the browser window to provide a user interface. The framework provides a bidirectional Python-JavaScript bridge, allowing functions in either language to call each other in real time. It also includes a desktop application bundler to package Python code and web assets into a standalone executable for distribution. The system covers application window management, loc

This project provides a framework for building native graphical user interfaces that run consistently across desktop and mobile operating systems. It functions as a bridge that allows developers to construct complex application layouts and render high-performance visual elements by utilizing a native C++ widget toolkit. The framework enables the creation of responsive user interfaces through both traditional widget-based components and declarative markup languages. It employs a decoupled messaging system to connect interface components and uses a pre-compilation step to manage object introspe

Druid is a native user interface toolkit and 2D graphics engine for the Rust programming language. It functions as a retained-mode, data-driven framework for building graphical user interfaces that run across Linux, macOS, and web browsers via WebAssembly. The toolkit distinguishes itself through a data-first approach to UI design, utilizing lenses to isolate subsets of global application state and synchronize them with specific widgets. This allows the visual layout to update automatically when the underlying data model changes. Its capability surface includes a constraint-based box layout

Phoenix is a cross-platform Python framework designed for building native desktop graphical user interfaces. It functions as a language binding generator and build automation system, enabling developers to create applications that utilize the underlying operating system's native controls and visual styles. The project provides a mechanism for mapping native C++ graphical toolkit components to Python, allowing for the development of desktop

Chameleon is a cross-platform application framework and component library used to develop applications for the web and various mini-app platforms from a single shared codebase. It functions as a multi-platform build pipeline that compiles source code into different target formats while providing an MVVM-based user interface system for managing application state. The framework employs a polymorphic protocol to extend custom components and APIs, allowing for platform-specific implementations while maintaining cross-end compatibility. It includes a specialized build tool for static analysis that

MvvmCross is a .NET MVVM framework designed for building cross-platform applications by separating business logic from native user interfaces. It functions as a navigation engine and a UI data binding library, enabling the encapsulation of logic within view models that are reused across different operating systems. The framework provides a native hardware abstraction layer and a dependency injection container to decouple components and provide a consistent interface for accessing device features. It coordinates type-safe transitions between native screens and manages the synchronization of da

Mobile-angular-ui is a frontend framework designed for building touch-friendly mobile web applications using AngularJS and Bootstrap styles. It provides a toolkit for creating cross-platform interfaces with native-like gestures and responsive layouts, enabling developers to transform standard desktop web interfaces into touch-friendly mobile layouts with minimal structural adaptations. The framework includes directive-driven UI components such as sidebars, overlays, switches, and navigation bars. It supports declarative state management through generic directives that bind state transformatio

This project is a cross-platform UI framework and native desktop GUI library. It provides a unified set of instructions to render native windows, forms, and layouts across different operating systems by mapping high-level instructions to the native widgets and controls of the host environment. The toolkit includes a vector graphics engine for rendering custom shapes, gradients, and high-density images using brushes and matrices. It also serves as a native dialog provider for system-level operations such as file path selection and message box alerts. The library covers a broad range of GUI co

systray is a Go library used to create and manage icons and menus within the operating system notification area. It functions as a cross-platform GUI library that provides a persistent application entry point and a notification area menu manager. The library enables the creation of hierarchical menus and custom tray icons across different desktop operating systems. It supports the use of nested submenus and allows for the styling of individual menu entries with custom images. The toolset covers a range of interaction capabilities, including the management of menu item states through checked

NativeBase is a comprehensive toolkit of accessible components and responsive design frameworks used to build consistent mobile and web applications. It provides a cross-platform UI component library and a React Native component framework that enable the creation of layouts across Android, iOS, and the web from a single codebase. The system is distinguished by a responsive design system that automatically adjusts layouts and global themes to fit different screen sizes and color modes. It utilizes a utility-based styling approach, allowing developers to apply visual styles directly through com

Toga is a cross-platform application framework and native GUI toolkit for Python. It serves as a multi-platform frontend wrapper that allows a single codebase to be deployed across macOS, Windows, Linux, Android, and iOS. The toolkit functions as a native widget UI library, mapping high-level Python interface definitions directly to the host operating system's own visual components. This ensures that applications use native system widgets to match the look and feel of the target environment rather than relying on custom drawing libraries. The framework covers cross-platform development for d