Open-source alternatives to User Interface Samples

Streamdown is a streaming markdown renderer for React that transforms incoming markdown text into sanitized HTML in real time, handling incomplete blocks as they arrive. It parses GitHub-Flavored Markdown syntax including tables, task lists, and footnotes, and renders LaTeX math expressions using KaTeX, Mermaid diagrams as interactive SVGs, and code blocks with Shiki-based syntax highlighting supporting over 200 languages with dual light and dark themes. The renderer includes an XSS-safe HTML sanitizer that strips dangerous tags and validates URLs to prevent injection attacks. What distinguis

EffectiveAndroidUI is a collection of reference implementations and sample projects demonstrating Android UI architectural patterns, navigation strategies, and resource management techniques. It provides practical examples of implementing Model-View-Presenter and Model-View-ViewModel patterns to separate business logic from the user interface. The project features demonstrations of centralized screen transition logic and communication between fragments. It includes examples of resource management using custom qualifiers to organize assets and adapt layouts based on screen density and size. T

RichText is an Android view component and parser designed to render formatted text from HTML and Markdown sources. It converts these markup languages into native Android UI components to display styled text, code blocks, and embedded media. The project includes an interactive text view that handles user interactions for hyperlinks and images. It utilizes a mobile media cache manager to store assets in both memory and on disk, reducing redundant network requests. The system provides capabilities for media handling, including dynamic image dimension correction to maintain layout consistency an

This project is a collection of reference implementations demonstrating recommended patterns for organizing code and managing data flow in Android applications. It provides structural examples of layered architecture, separating code into presentation, domain, and data layers to decouple business logic from data sources. The repository includes specific samples for implementing declarative user interfaces that automatically update their visual state based on underlying data changes. It further demonstrates how to manage object lifetimes and component dependencies to reduce boilerplate and sim

Hyperapp is a functional JavaScript framework for building hypertext applications. It centers on a state management library and a virtual DOM system that creates in-memory interface representations to apply efficient updates to the browser screen via diffing. The framework avoids templates and JSX, instead utilizing function composition and dedicated tag wrappers to generate HTML structures and SVG elements. It implements a unidirectional data flow where a central state object is managed through transformation functions. The system covers declarative UI rendering and functional web interfaci

JKeyboardPanelSwitch is an Android library designed to manage soft keyboard visibility and coordinate transitions between the software keyboard and custom input panels. It functions as a layout manager and state tracking system that monitors keyboard height and visibility to prevent layout flickering. The library focuses on synchronizing layout dimensions and resolving transition conflicts to eliminate visual jumps. It utilizes real-time window inset tracking and coordinate-based synchronization to align overlapping interface elements precisely during input method switches. The system includ

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

Accompanist is a collection of extension libraries that provide additional functionality and specialized components for the Jetpack Compose UI framework. It serves as a toolkit for implementing common layout and system tasks that extend the core capabilities of declarative UI development on Android. The library provides specialized utilities for managing modal bottom sheet destinations and defining custom animations for screen transitions within a navigation graph. It includes tools for detecting screen folds and display features to create adaptive layouts that adjust based on window size and

This is a Kotlin Multiplatform UI framework for building consistent user interfaces across desktop, web, and mobile platforms using a single codebase. It functions as a declarative framework that enables the creation of shared UI components that run across multiple target environments. The project includes a cross-platform desktop toolkit for managing native window features, system notifications, and hardware acceleration. For web targets, it provides a declarative interface library and a rendering engine that executes via WebAssembly to achieve high-performance execution in browsers. The fr

Hyperapp is a lightweight JavaScript framework for building web applications. It functions as a declarative state management system that synchronizes the user interface with a centralized application state. The framework utilizes a virtual DOM to render user interfaces and reconcile changes to the browser display. It employs a subscription model to synchronize external web APIs and asynchronous events with the global state. The system manages data through a single-state-tree architecture, where updates are handled via discrete actions and pure functions. This approach ensures that the view u

Kvaesitso is a search-centric Android launcher that replaces the traditional home screen with a unified search interface for launching apps, searching files, and performing quick actions. Its core identity is built around a search-first model that indexes apps, contacts, files, and external services, supported by a Material Design 3 theming system with custom color palettes and monochrome icon filters for a personalized appearance. The launcher distinguishes itself through an extensible plugin system that adds new data providers for weather, file search, cloud storage, public transport, and t

Compose Multiplatform is a declarative user interface framework that enables the development of native graphical interfaces across desktop, mobile, and web platforms using a single Kotlin codebase. It functions as a multiplatform library that allows developers to share both application logic and UI components while maintaining access to platform-specific features through abstraction layers. The framework utilizes a reactive state management system that automatically tracks data mutations to trigger granular interface updates. By employing a cross-platform rendering engine based on a hardware-

This project is a comprehensive educational knowledge base designed to support developers in mastering React and its surrounding ecosystem. It serves as a technical interview resource, providing a structured collection of questions and answers that cover core concepts, architectural patterns, and common development challenges. The repository distinguishes itself by offering detailed explanations of fundamental React principles, including component-based composition, the declarative UI paradigm, and state-driven data flow. It provides clarity on complex topics such as the Fiber reconciliation

ImmersionBar is a set of control utilities for Android designed to manage immersive display modes, notch-aware layouts, virtual keyboard visibility, and system bar aesthetics. It provides a centralized way to maximize screen real estate by toggling full-screen displays and controlling the behavior of status and navigation bars. The library distinguishes itself through specialized adaptation for hardware cutouts and notches, calculating precise offsets and window insets to prevent user interface elements from being obscured. It also includes a dedicated handler for soft keyboard management, wh

Auxio is an Android music player and local audio library manager designed for playing audio files stored on internal storage and SD cards. It provides a system for organizing music collections using metadata and folder structures. The application features home screen widgets that allow for playback control and library navigation without opening the full app. It also includes integration for projecting playback controls and interfaces to vehicle head units via Android Auto. The software covers local audio playback with volume normalization and gapless transitions. It includes tools for music

This project is a native Android TV Bilibili client and third-party video player designed for streaming and browsing video content on large screens. It functions as a television-centric media application that enables users to access Bilibili content through an interface optimized for distance and remote control navigation. The application implements remote-optimized navigation to map hardware input to UI focus patterns and utilizes adaptive bitrate switching to adjust video quality based on network conditions. It employs a reactive state management architecture and a type-safe network layer t

Trix is a rich text editor and WYSIWYG text component designed for composing and formatting documents with inline styling and block elements. It functions as an HTML content editor that manages and sanitizes input to ensure a secure and consistent document structure, while serving as a document state manager that tracks edit history and persists serialized state. The editor integrates directly with standard HTML forms, converting rich text into data for submission. It features a configurable sanitization engine that cleanses input HTML to remove unsupported tags and mitigate security risks.

uHabits is a habit tracking application and behavioral progress tracker designed to monitor daily routines and build long-term consistency. It utilizes mathematical decay formulas to calculate habit strength, rewarding consistent activity while limiting the impact of occasional misses. The system includes a customizable scheduling engine that defines repetition patterns for recurring goals, supporting both simple daily and complex weekly intervals. Users can interact with their data via a home screen widget dashboard, allowing them to monitor status and mark tasks complete without opening the

PasteMD is a clipboard-based document processor and productivity tool designed to convert Markdown or HTML content into formatted office documents. It transforms markup and mathematical formulas from the clipboard into rich text for direct insertion into word processors and spreadsheets. The system functions as a style orchestrator, using reference documents and templates to apply specific fonts, colors, layouts, and margins to the converted text. This allows for the customization of output appearances to match specific document requirements. The tool handles technical document composition b

Omni-Notes is a mobile note-taking application and personal knowledge management tool used for creating and organizing text notes, checklists, and sketches. It functions as a multimedia knowledge base that integrates voice input, images, and audio files to maintain a searchable digital archive. The application utilizes a tag-based filtering system to group and search for stored information using metadata and categories. It further extends productivity by providing home and lock screen widgets that expose note snapshots and shortcuts for rapid access. The system supports the creation of struc

pdfkit is a JavaScript PDF generation library used to programmatically create binary PDF documents in Node.js and browser environments. It functions as a vector graphics engine for rendering paths, shapes, gradients, and tiling patterns, and as a tool for producing rich text and tagged documents that follow international accessibility standards for screen reader compatibility. The library includes a security and encryption utility for applying document encryption and restricting user permissions regarding printing, copying, or editing. It also serves as a form and annotation tool, enabling th

This project is a rich text editor component for React applications that provides a visual interface for composing and formatting content. It functions as a DraftJS-based WYSIWYG editor, allowing users to create structured documents with inline styles and block types. The editor features a customizable toolbar interface for managing text alignment, lists, and media embeds. It includes a specialized input system for inserting emojis, hashtags, and user mentions as single deletable units. The project provides capabilities for transforming internal editor state into HTML, JSON, or Markdown form

Pell is a JavaScript text editor library and browser-based rich text editor. It provides a lightweight WYSIWYG HTML editor for formatting styled text and outputting HTML directly within a web browser. The library is a dependency-free vanilla implementation that uses standard Web APIs. It allows for the definition of custom editor actions and text actions to extend the toolbar and the creation of custom visual themes to modify the editor appearance. The editor covers rich text editing and browser-based text formatting, including the application of bold, italic, headings, and lists. It also su

This project is a reference library for Android development, providing source code and sample applications that demonstrate architectural patterns and the implementation of core API capabilities. It serves as a collection of reference implementations for data management, system integration, and user interface component development. The library provides specific examples for managing hardware interfaces, background tasks, and inter-process communication. It includes a gallery of user interface components and patterns for implementing accessibility features and system-level font scaling. The p

This project serves as a comprehensive reference and directory for lightweight markup languages, providing a centralized resource for learning syntax and discovering software tools. It functions as a foundational guide for authors and developers, offering detailed documentation on how to structure plain text for web and print publishing. The resource distinguishes itself by cataloging a wide range of software applications and editors, allowing users to evaluate tools based on their specific syntax support and functional capabilities. Beyond basic syntax, it covers advanced formatting techniqu

Davinci is a business intelligence and data visualization platform used for building interactive dashboards and reports. It functions as a SQL-based dashboard builder and multi-tenant analytics service that connects to databases via JDBC and CSV files to transform raw data into visual components. The platform is distinguished by its granular security model, which includes row-level and column-level permissions integrated with LDAP and OAuth2 authentication. It also provides an embedded visualization tool that allows secure, parameterized charts and dashboards to be inserted into external appl

This library provides a toolkit for implementing rich text editing within native iOS applications. It functions as a reusable interface component that enables users to apply visual styles such as bold, italics, colors, and text alignment to their content. The editor is built upon the native system text components, intercepting input events to manage formatting through attribute-based text manipulation. It features a modular architecture that decouples the editing interface from the underlying formatting logic, allowing developers to inject custom tool definitions and selectively enable or dis