Open-source alternatives to MessageKit

ChatKit is a library of reusable native Android components and frameworks designed for rendering chat visuals, message threads, and media pickers. It provides a set of pre-built UI elements to facilitate the development of messaging interfaces, including conversation lists and text input fields. The toolkit includes specialized media management capabilities, such as a full-screen image viewer with pinch-to-zoom and swipe-to-dismiss gestures, as well as mechanisms for importing photos and videos from device storage. It also features dynamic selection dialogs that adjust their layout based on t

This is a keyboard interaction library and manager for React Native that provides smooth animations, gesture-based dismissal, and event tracking. It serves as a cross-platform keyboard event bus, ensuring consistent keyboard show and hide behavior between iOS and Android. The project features an interactive animation driver that links native keyboard frame events directly to animated values to bypass bridge round-trips. It enables interactive keyboard dismissal via swipe gestures and includes a keyboard preloading system to eliminate first-show latency and input lag. The library provides com

CSStickyHeaderFlowLayout is a specialized layout wrapper for UICollectionView on iOS. It provides a sticky header list component where section headers remain pinned to the top of the screen during scrolling. The project implements parallax header effects, allowing background images to move at a different speed than foreground content to create depth. It also includes animated header images that expand or collapse based on the user's scroll position. The layout manages coordinate-based view repositioning and dynamic frame calculations to handle visual transitions. It utilizes offset-based scr

Mesop is a stateful, declarative Python web UI framework and component library designed for building interactive web applications and AI demos. It allows for the construction of data-driven interfaces and chat systems using only Python, removing the need to write separate HTML or CSS. The framework is specifically tailored for AI application development, offering dedicated tools for conversational UI design and the creation of dashboards for large language model applications. It distinguishes itself with a visual UI editor for real-time property adjustments and the ability to embed custom Jav

This project is a conversational interface framework and UI component library designed for building applications integrated with large language models. It provides a standardized provider integration layer to connect front-end components to various AI backends, alongside a dedicated response rendering engine for displaying generated content. The framework specializes in hybrid generative-UI composition, blending traditional interactive elements with dynamic model outputs. It features a protocol-driven system for converting structured data streams into interactive cards and includes tools for

Prompt-kit is a React-based toolkit and component library specialized for building conversational interfaces for large language models. It provides a framework of reusable UI elements designed to handle the specific requirements of generative AI, such as streaming text responses, rendering model reasoning, and managing complex model outputs. The toolkit distinguishes itself through specialized visualization capabilities, including the rendering of chain-of-thought reasoning traces and the display of external tool interactions. It also features an interactive preview system that renders genera

Aurora IMUI is a cross-platform chat UI component library that provides native interface elements for building instant messaging screens on Android, iOS, and React Native. It wraps platform-native UI components behind a unified interface, delegating rendering to each platform's native runtime while maintaining consistent behavior and appearance across devices. The library separates chat data into a platform-agnostic model layer that drives view updates through reactive bindings to native list components. It manages the multi-modal input bar as a finite state machine that switches between text

This project provides a cross-platform messaging interface toolkit designed for building real-time chat applications and generative AI agents. It offers a collection of pre-built components that render consistent messaging experiences across mobile and web environments, handling the complexities of state management and data synchronization between the user interface and backend services. The library distinguishes itself through a highly modular architecture that allows developers to inject custom logic and UI overrides via builder functions. This approach enables the creation of tailored mess

AnimatedCollectionViewLayout is a layout engine and animation framework for UIKit collection views. It provides a system for managing item positioning and fluid visual transitions within the iOS user interface. The project focuses on custom layout transition tools and a scroll animator capable of applying real-time parallax and zooming effects. These capabilities allow for the definition of unique animation paths and attribute transitions through a protocol-based implementation. The framework covers a broad range of visual effects, including scroll-based transitions and layout attribute inte

React Virtuoso is a React component library for rendering large datasets efficiently through virtualized lists, grids, tables, and chat interfaces. It automatically measures variable-height items at runtime, computes accurate scroll offsets without requiring fixed sizes, and renders only the items within the visible viewport plus a configurable buffer zone. The library manages scroll position through a state machine that tracks direction, position, and anchor items to handle auto-scroll, sticky headers, and bidirectional loading. The library distinguishes itself with specialized components fo

Panel is a Python data application framework used to build interactive dashboards and reactive user interfaces by connecting data visualizations, widgets, and callbacks. It functions as a reactive UI library that synchronizes application state with interface updates based on user interactions. The project distinguishes itself by offering multiple execution models, including a FastAPI-based web application server for scalable session management and a WebAssembly compiler that enables Python applications to run directly in the browser without a backend server. It also includes a specialized too

PyQt-Fluent-Widgets is a Python GUI component library and framework extension that provides a set of pre-styled UI components following modern Fluent design standards. It replaces standard PyQt controls with a specialized widget set designed for building contemporary desktop applications. The library distinguishes itself by offering advanced layout patterns, such as waterfall grids, loading skeleton screens, and split-view application shells. It provides a comprehensive collection of high-level interface elements, including navigation menu systems, configuration setting cards, and complex vie

The mdb-ui-kit is a frontend component library and visual extension that combines the Bootstrap 5 framework with Material Design principles. It provides a collection of pre-styled interface elements and responsive web templates to facilitate the development of consistent web applications. The toolkit extends the Bootstrap ecosystem by adding Material Design aesthetics and advanced styling options. It enables rapid prototyping through the use of pre-configured design blocks and provides mechanisms for deep visual customization via SCSS variables and native CSS custom properties, including supp

Wave is a full-stack web application framework and low-code UI library designed for building real-time data dashboards and interactive interfaces using Python and R. It allows developers to define browser-based user interfaces and manage server-side state without writing HTML or CSS. The project functions as a collaborative state synchronizer, relaying and persisting application state across multiple concurrent users to enable shared real-time experiences. It distinguishes itself by broadcasting live updates and data visualizations to connected browsers through a unified programming model. T

Lexical is a modular rich text editor framework used to build extensible web-based editors. It functions as a state-driven content editor that maintains a serializable, immutable snapshot of document content to ensure predictable updates and accessibility compliance. The framework is distinguished by its plugin-based architecture and customizable node framework, which allow developers to extend editor behavior through specialized content nodes and encapsulated runtime logic. It also includes a collaborative editing engine capable of synchronizing document state across multiple clients in real

This project is a framework of reusable UI components and extensions designed to integrate structured input and selection menus into native iOS alert controllers. It provides a library of customizable text fields and specialized picker interfaces that embed directly within system alert dialogs. The framework distinguishes itself by injecting external view controllers into alert containers, enabling the use of complex interfaces such as maps and date pickers. It also includes specialized integration tools to embed selection interfaces for photos, contacts, and locations directly from the Teleg

Nimbus is an iOS UI framework and application toolkit providing a collection of reusable interface components and layout tools for building native mobile applications. It includes a SwiftUI component library and a structured interface design system for maintaining consistent styling across Apple platforms. The framework employs a declarative approach to visual formatting, using CSS-based component styling to define colors, fonts, and spacing. It further streamlines development through a component-based construction system and declarative style mapping. The toolkit covers a range of interface

mescroll is a JavaScript infinite scroll library and mobile web scroll manager designed to implement pull-to-refresh and pull-up-loading patterns. It provides a system for handling touch-based scrolling, managing pagination states, and integrating these behaviors within Vue applications. The library distinguishes itself through specialized support for chat interfaces, enabling reverse-order data loading and the ability to inject data in a reverse direction to simulate message histories. It also includes a state-persistent scroll cache to preserve vertical offsets and list data when users navi

Nuxt UI is a comprehensive Vue component library built for the Nuxt ecosystem, providing over 125 production-ready, WAI-ARIA compliant components for building modern web applications. The library offers a complete design system with Tailwind CSS theming, supporting dark mode, custom color palettes, semantic color aliases, and runtime theme switching through CSS design tokens. It includes built-in internationalization for over 50 languages, server-side rendering compatibility, and a Figma kit that mirrors the code components for design-to-development consistency. The library distinguishes itse

XRecyclerView is an Android list component and extension library that adds pull-to-refresh and infinite scrolling behaviors to a standard RecyclerView. It serves as a scrollable mobile UI element designed to manage data-driven lists with support for dynamic headers and footers. The library provides a gesture-based interface for triggering content reloading via a pull-to-refresh widget and implements a mechanism for triggering data fetch callbacks when a user reaches the bottom of a list to enable infinite scrolling. It further supports dynamic list header management and the implementation of

Koloda is an iOS gesture interaction library and SwiftUI view component used to create swipeable card interfaces. It provides a stack-based view component that manages overlapping views, ensuring only the top-most element remains actively interactive. The library allows for the customization of card appearance, including the configuration of overlays and animations that dictate how background cards move during a swipe. It manages drag behavior and swipe directions, triggering specific logic when cards are swiped, tapped, or fully exhausted. The component covers the implementation of gesture-

SwiftUIX is a framework extension and component library that provides specialized layout tools and native platform bridges for SwiftUI. It functions as a declarative toolkit for building macOS and iOS applications by adding missing native components and expanded interface elements to the standard library. The project focuses on bridging declarative state to native imperative APIs, particularly for macOS desktop interfaces. It includes specialized controls for window visibility, navigation bar appearance, and system status bar integration, as well as tools for managing system activity controll

This project is a cross-platform messaging SDK and client development library used to build custom Telegram applications. It functions as a comprehensive framework that manages network encryption, local data storage, and API communication, providing a C-compatible JSON interface that allows integration with any programming language. The library distinguishes itself by providing a full database manager for encrypted local caching and synchronized state, alongside a dedicated bot framework for creating interactive bots with business account integration. It enables the implementation of speciali

SVProgressHUD is a progress HUD library and overlay manager for iOS and tvOS applications. It provides a lightweight interface system for signaling background activity and operation status through task progress indicators and loading spinners. The system includes capabilities for visual style configuration, allowing for the adjustment of colors, fonts, and images. It also integrates haptic feedback triggering to generate physical vibrations on supported hardware to signal success, information, or error states. The library covers the management of app loading states and the display and remova

Nannou is a creative coding framework for Rust designed for building interactive visual and audio sketches. It provides a loop-based API with hardware-accelerated 2D and 3D rendering, serving as a toolkit for generative art production and multimedia installation design. The framework is distinguished by its comprehensive hardware communication interface, which bridges software with physical devices via MIDI, OSC, DMX, serial, and laser DAC protocols. It also includes specialized projection mapping tools for warping visual output to fit non-standard physical surfaces and a dedicated GPU shader

This project provides a lightweight Markdown text editing component designed for integration into React applications. It offers a split-pane interface that allows users to author content in a raw text editor while simultaneously viewing a rendered preview, with synchronized scrolling to ensure the two views remain aligned during the writing process. The editor is built to be highly extensible, allowing developers to customize the interface by toggling specific toolbar buttons or preview areas. It supports a plugin-based architecture for custom parsing logic and provides a callback-driven work

This is an Android context menu library and UI component toolkit used to create animated, context-sensitive overlay menus that render above the existing view hierarchy. It functions as a navigation framework for implementing interactive menu components and transitions, allowing users to access secondary actions without leaving the primary screen. The library utilizes a fragment-based menu manager to handle the existence and state of menu components by injecting dedicated fragments into the activity window. It provides a set of customizable view-group compositions and a property-based animatio