Open-source alternatives to AsyncDisplayKit

Litho is an Android declarative UI framework and component library used to build user interfaces through a declarative API and immutable state. It functions as an asynchronous layout engine that maps components to a structured view hierarchy to automate view updates. The framework optimizes rendering performance by computing element positions on background threads to prevent blocking the main UI thread. It further improves efficiency by flattening nested view hierarchies and caching layout results. The system includes capabilities for state reconciliation, component recycling, and the render

Partytown is a main thread performance optimizer and web worker script orchestrator. It functions as a third party script offloader that relocates resource-intensive external JavaScript from the browser's main thread into a sandboxed web worker environment. The project focuses on improving core web vitals and overall page responsiveness by reducing main thread blocking time. This isolation ensures that heavy third party scripts do not interfere with the execution of core application code and page loading speed. The system provides infrastructure for client-side script offloading through DOM

SDWebImage is an asynchronous image loading library for iOS that provides a framework for fetching, decoding, and caching images. It consists of a core loading library, a decoding engine, a processing pipeline, and a caching system designed to reduce network traffic and improve load times. The project features a two-tier caching architecture that stores assets in both volatile memory and persistent disk storage. It distinguishes itself through a modular loader pattern and a plugin-based decoding system, which allow for the integration of custom storage engines and the support of non-standard

Textual is a Python TUI framework and asynchronous UI library used to build interactive text user interfaces. It provides a component-based architecture for creating cross-platform applications that run in both terminal and web browser environments. The framework distinguishes itself by utilizing a CSS-based layout engine to apply visual styles to widgets and a command palette interface for discovering and executing application functions. It also supports hosting terminal-based interfaces on the web to enable remote access via a standard browser. The toolkit covers a broad range of capabilit

This project is a technical guide and implementation library for advanced visual effects and hardware-accelerated animations using the Core Animation framework on iOS. It provides a comprehensive reference for creating high-performance motion graphics, custom graphic rendering, and the construction of 3D engines using perspective transforms and Z-axis manipulation. The collection distinguishes itself through a deep focus on GPU rendering optimization and graphics performance. It covers advanced strategies to maintain high frame rates, such as reducing offscreen rendering via shadow path optim

PINRemoteImage is an image downloading and caching framework for iOS. It functions as a remote image loader and multi-threaded manager designed to fetch images from URLs and render them into user interfaces. The project includes specialized decoders for rendering GIF and Animated WebP formats. It also features a progressive JPG renderer that displays scans with blur effects to improve perceived loading speed on slow connections. The library manages concurrent download tasks with request deduplication and utilizes a hybrid memory and disk caching system. It handles high-resolution asset scali

AlamofireImage is an image downloading and caching library designed as an extension for Alamofire. It provides a serialization framework to convert network responses into image objects and a memory-based caching system to reduce redundant network requests. The project features a variant-aware asynchronous cache that stores both original images and their filtered versions separately. It includes tools for animating the replacement of placeholder images with downloaded content through various transition effects. The library covers image acquisition through parallel downloading and prioritized

FXBlurView is an iOS blur effect library and image processing tool designed to render Gaussian blur effects over application views and static images. It provides a UIKit background blur view component that can be applied to UI elements to create blurred backgrounds. The library supports both real-time blurring of live application views and the processing of static images. It offers two primary rendering modes: a single-pass static rendering for efficiency and a dynamic background-thread processing mode to maintain user interface responsiveness during heavy computations. Additional capabiliti

This project is a cross-platform animation library for React Native that provides a declarative engine for building high-performance user interfaces. It functions by offloading animation logic and interaction processing to the native UI thread, ensuring that visual transitions remain smooth and responsive even when the main application thread is under heavy load. The library distinguishes itself through a specialized architecture that transforms standard functions into units capable of executing directly on the native thread. It utilizes shared-memory synchronization to maintain consistent da

This framework provides a multi-process architecture for building desktop applications using web technologies. It manages the application lifecycle, window states, and system-level integrations through a primary entry point, while isolating web content in separate rendering processes to maintain stability and security. A secure bridge mechanism facilitates communication between these isolated contexts and the main process, ensuring that privileged system APIs remain protected. The framework distinguishes itself through a comprehensive security model that includes process sandboxing, content p

Muuri is a JavaScript grid layout library and draggable UI framework used to create responsive grids with drag-and-drop reordering, sorting, and animated filtering. It features a nested grid system that allows full grid instances to be embedded inside other grid items to create hierarchical structures. The library uses a web worker layout engine to offload heavy coordinate calculations to background threads, maintaining interface responsiveness during complex rearrangements. The system provides interactive capabilities for moving items between multiple containers, filtering visibility based

HanekeSwift is a generic caching library for iOS and a specialized image caching framework. It provides a multi-level system that stores arbitrary data types in memory and on persistent disk storage to reduce network requests. The project features a specialized image handler that manages asynchronous loading, resizing, and disk storage for user interface components. It includes a background retrieval system that fetches remote content and automatically populates local caches. The library covers key-value data storage with sequential fallbacks, where it checks memory, then disk, and finally r

LearningNotes is a technical knowledge base and engineering study guide focused on Android framework internals, system architecture, and mobile performance optimization. It serves as a reference for analyzing the Android boot sequence, process bootstrapping, and system service initialization. The project provides detailed guides on mobile performance, including strategies for reducing memory footprints, identifying memory leaks, and optimizing image decoding. It further covers Android inter-process communication using AIDL and the Binder kernel driver, as well as software architecture manuals

Chatto is a Swift-based UI framework and component library for building messaging interfaces on iOS. It provides a collection of reusable interface components for rendering text bubbles, photo attachments, and interactive input areas. The framework centers on a paginated chat interface that loads conversation history in both directions. To maintain scrolling performance, it employs background layout calculations for message cells. The library covers the construction of modular messaging screens and the implementation of mobile chat interactions, such as keyboard dismissal and swipe-to-reveal

nprogress is a lightweight JavaScript UI component and web progress bar library. It provides a minimalist DOM progress indicator used to track the state of asynchronous operations within a browser document. The library allows for the visualization of loading states through a thin progress bar and spinner. It supports progress state management, enabling the bar to be started, stopped, or marked as complete, with support for incremental progress tracking and percentage-based updates. Users can modify the visual style by overriding default CSS or replacing the markup template. The component als

This project is a reactive, offline-first NoSQL database engine designed for JavaScript applications. It provides a robust framework for managing application state by synchronizing data across browsers, mobile devices, and server-side runtimes. By treating local storage as the primary source of truth, it enables applications to remain functional without network connectivity, automatically reconciling changes with remote backends once a connection is restored. The database distinguishes itself through a modular architecture that supports cross-environment synchronization and high-performance d

React is a JavaScript library for building user interfaces based on a component-driven architecture and unidirectional data flow.

ComponentKit is a declarative UI framework for building iOS interfaces through composition of small, reusable components. It provides a structured approach to constructing user interfaces where each component is defined as an immutable, pure function of its inputs, enabling predictable rendering and state management. The framework supports both stateless and stateful components, with controllers that can be attached to manage persistent state across component updates. The framework distinguishes itself through its component architecture that emphasizes explicit data flow and compile-time safe

PyScript is a framework that enables the execution of Python code directly within a web browser. By leveraging WebAssembly, it provides a runtime environment that allows developers to perform data processing and computational logic locally, eliminating the need for a backend server to handle these tasks. The platform distinguishes itself by bridging the gap between standard web technologies and the Python runtime. It facilitates the synchronization of data and events between the browser document object model and Python scripts, while also supporting the mounting of local or remote assets into

GitUI is a terminal-based interface for managing Git repositories, providing an interactive environment for executing version control operations, inspecting commit logs, and navigating file hierarchies. It functions as a keyboard-driven client that allows users to stage changes, manage branches, and review project history directly from the command line. The application distinguishes itself through a focus on interface responsiveness and user-defined workflows. It utilizes background thread offloading and asynchronous data caching to maintain performance during complex operations, while offeri

This library provides a rendering engine that translates declarative component trees into PDF files. It enables the construction of complex document structures using a component-based architecture, allowing developers to define layout, styling, and content programmatically. The system operates across both browser and server-side environments, offering a unified interface for generating structured documents. The project distinguishes itself through a sophisticated layout and rendering pipeline that handles the complexities of document creation. It utilizes a flexbox-based engine for element po

Flexsearch is a full-text search library designed to execute complex indexing and retrieval operations directly within the web browser. By operating entirely on the client side, it enables rapid information lookup without requiring a backend server, ensuring that search functionality remains self-contained and private. The library distinguishes itself through a highly configurable text processing pipeline that allows developers to tailor tokenization and normalization to specific language requirements. To maintain interface responsiveness during large-scale queries, it utilizes background thr

RxAndroid is a reactive programming library and binding layer that integrates RxJava with the Android runtime environment. It provides a framework for composing asynchronous data streams and managing event-driven workflows specifically tailored for Android's threading requirements. The library functions as an Android thread scheduler, routing reactive operations to the main UI thread or specific Android loopers. This ensures that asynchronous task outcomes are dispatched to the primary interface thread for safe updates of visual components while preventing background processing from blocking

AGCircularPicker is helpful component for creating a controller aimed to manage any calculated parameter

a Blazor component based on animate.css to easly animate your content

DLSlideView对常见的顶部Tab页点击、滑动分页做了封装。 它使用基于ViewController的container特性（而不是scrollview）来管理各个子页面，保留原始的系统消息，没有隐患。 同时内存模型更优于使用scrollview的方式，理论上可以支持无限分页。

material-dialogs is a Kotlin UI component library that provides a collection of modal dialogs and bottom sheets for Android applications. It is designed to implement user interface elements that follow Material Design standards. The library provides specialized modal interfaces for selecting calendar dates, clock times, and specific color values. It also includes system chooser integrations for selecting files and directories from local storage. Beyond pickers, the library covers a broader range of interaction components including text input dialogs, modal alerts with action buttons, and bot