Libraries & frameworks

A modern TypeScript framework for building server-side apps on Express and Koa.

An accuracy-focused reimplementation of the XNA 4 runtime library for building and porting desktop games.

Rust-based declarative rendering engine turning JSX, HTML, and CSS into OG images, animations, and paged PDFs without a headless browser across Node, Workers, and browsers.

A multiplatform Kotlin library for building command-line interfaces with nested commands, type-safe options, and auto-generated help.

Enterprise-grade reinforcement learning framework for LLM and VLM post-training, supporting large-scale distributed rollouts with low-precision optimizations for efficient training at scale.

Python 3.9 to JavaScript compiler - Lean, fast, open!

A collaborative offline-first sync layer on SQLite that brings real-time, multi-device shared state to web apps.

Brings Ghostty terminal emulation to browsers with xterm.js API compatibility, delivering high-fidelity VT100 parsing and rendering for web-based terminal applications and developers.

An accuracy-focused reimplementation of the XNA 4 runtime that lets developers build and run XNA games on open desktop platforms.

Data-centric LLM training framework inside the LLaMA-Factory loop, featuring dynamic sample selection, domain mixture optimization and adaptive efficient example reweighting schedules.

A high-concurrency web crawling engine written in Rust for low-latency streaming data extraction, supporting smart rendering, respectful crawling controls, and distributed scaling for large datasets.

A community-maintained NuGet library for .NET MAUI developers offering extensions, advanced UI controls, and behaviors that simplify building cross-platform mobile and desktop apps.

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A declarative GUI library for the Zig programming language that builds tiny native cross-platform desktop and WebAssembly apps using operating system controls with cross-compilation support.

A Flutter plugin for displaying local notifications across Android, iOS, macOS, Linux, Windows, and web that developers integrate into apps with platform-specific implementations.

A Python library and CLI that interfaces with Google Translate text-to-speech to convert text into spoken MP3 audio.

A Rust library for building interactive terminal prompts including text, select, multiselect, confirm, date, and password inputs.

Modern implementation of wxPython that gives Python developers native, cross-platform graphical interfaces, allowing desktop applications to retain each operating system's familiar appearance and behavior.

A pure JavaScript client for the tus resumable upload protocol

🍫 Tastier cookies, local, session, and db storage in a tiny package. Includes subscribe() events for changes.

A database-backed Active Job backend for Ruby on Rails that handles asynchronous jobs with scheduling, retries, and concurrency controls, simplifying production task processing without external dependencies.

A free open-source 3D game engine written in C++ with Lua scripting, featuring PBR rendering, physics, audio, and a full editor.

React micro-interaction component library built on animation primitives, providing transitions, cards, and layout blocks with scaffold-style components for fast integration.

Python UI library adding Material Design-compliant widgets to the Kivy framework, enabling developers to build cross-platform, touch-enabled graphical applications from a single codebase.

Prebuilt, customizable React component library on shadcn/ui for AI-native apps, offering chat, message, and reasoning displays distributed through a component registry.

Web animation library for building smooth, responsive interactive effects. Offering reusable components and conceptual contracts, it lets frontend developers integrate polished motion directly into applications.

A JavaScript client library for local-first user data storage and sync across remoteStorage, Dropbox, and Drive.

Root-free Android hooking framework replicated from LSPatch and based on LSPosed, injecting code into application packages and providing manager and module runtime support.

High-performance quantitative research framework built with Rust and Python, providing strategy backtesting, performance metrics calculation, and historical market data integration for researchers.

Free open-source Go framework for building fast, elegant 2D and 3D applications that run on macOS, Windows, Linux, iOS, Android, and the web from one codebase.

A cross-platform installer and auto-update framework that turns app builds into installers with fast delta updates for developers.

A C++ library enabling runtime-compiled code changes with instant feedback, state preservation, and error recovery for faster iteration.

A cross-platform C library for communicating with USB and Bluetooth HID devices, built for developers to embed in applications.

A mature Java library for reading and writing Excel, Word, PowerPoint, and other Microsoft Office formats in your applications.

Offers a zero-dependency pure TypeScript spreadsheet engine that reads and writes XLSX, CSV, and ODS with streaming and styling across all JavaScript runtimes.

Open-source development kit for on-device AI on Apple platforms, offering model export recipes, foundational building blocks, and integration runtime for app developers.

A development library that converts geospatial data such as buildings, road networks, transit, and points of interest into graph structures for graph neural networks and spatial network analysis workflows.

A fast, lightweight .NET library for creating and editing Word documents programmatically without requiring Microsoft Word installed.

A TypeScript library and local-first platform giving web and mobile apps offline-capable data sync with CRDTs and SQLite.

An ultra-fast, customizable open-source charting library for Python offering declarative interactive charts, smooth zooming over massive datasets, and static export in multiple formats.

Browser-based file preview library for native JavaScript, React, Vue, and Svelte that embeds PDF, document, audio, video, archive, email, and 3D previews inside page containers.

A pipeline for synthesizing benchmark-oriented training data and reproducing fine-tuning plus evaluation in one run. Aimed at practitioners seeking rapid base-model gains through single-iteration data generation.

A Rust profiling library that pinpoints CPU, timing, memory, SQL, and async bottlenecks, helping developers analyze hot paths and visualize results in reports and dashboards.

A local-first, end-to-end encrypted peer-to-peer sync protocol that lets developers build private decentralized alternatives to chat, docs, and database apps.

High-performance API framework for Django combining Actix Web, PyO3 bridging, and msgspec serialization to reach 60k+ RPS with decorator routing, authentication, middleware, and type validation.

Provides a free, modern open-source engine for visual novels, offering script staging, performance direction, and asset management for game developers and creators.

Python library for scraping tweets, profiles, followers, and following from Twitter/X without official API keys. Features multi-account pooling, proxy support, async collection, and multi-format export.

High-performance JSX UI runtime operating outside the browser, compiling Solid and Vue-compatible components into natively rendered trees with hardware drawing and 60 FPS animation under an 8 MB memory budget.

Flight-compliant WebAssembly interpreter designed for onboard spacecraft execution, providing validated decoding and a deterministic memory model for reliable in-orbit computing.

Full-featured C++ file-dialog library for Dear ImGui, enabling developers to embed customizable file pickers with multi-selection, filters, thumbnails, and additional side panels.

A copy-paste React component library for Remotion developers offering production-ready animations, transitions, backgrounds, and scenes to assemble promotional videos quickly while owning the source code.

Implements a 3D game engine from scratch in C and Vulkan as a YouTube teaching series, giving graphics programmers a core runtime with rendering, audio, plugin support, and testbed examples.

A C library for creating and extracting zip archives with multi-algorithm compression, encryption, and disk splitting support.

A Unity package for efficient runtime and editor import and export of glTF 3D models in games and apps.

A collection of JavaScript libraries for progressive web apps that simplifies service-worker caching and offline support.

A maintained set of Windows Native API headers for C programs to access native system interfaces across Windows versions.

A lightweight, embeddable multi-paradigm programming language with compiler, VM, and libraries for desktop, web, game, and mobile apps.

A cross-platform C++ SDK providing low-latency audio, networking, and cryptography libraries plus examples for mobile, desktop, and embedded apps.

High-performance compiled frontend framework compatible with React's programming model, eliminating the virtual DOM in favor of direct fine-grained local updates for developers.

A lightweight modern C++ library for building Discord bots, with sharding, voice support, slash commands, and efficient caching.

Open research codebase reproducing DeepSeek-style Engram memory-injection architecture on Qwen-3 and Stable Diffusion, comparing against LoRA fine-tuning with training experiments and vision extensions.

A pure PHP library for creating and manipulating PowerPoint and OpenDocument presentations programmatically in web applications.

A popular Python office-automation library covering PDF, Word, Excel, PPT, WeChat, and more with simple one-line APIs.

A high-performance, cross-platform 2D game engine written in C++11 with optional Lua scripting.

An open-source component suite for embedding Chromium-based browsers into Delphi and Lazarus applications.

A Windows debugging framework for developers to build custom debuggers and debugging tools with an easy, complete API.

A header-only C++ library for embedding fast asynchronous HTTP and WebSocket servers into applications and REST services.

Simulates Kubernetes clusters entirely in the browser without a backend, helping authors build visual, interactive tutorials and playgrounds for learning and documentation.

The official Java client for Appium that implements the WebDriver protocol for mobile and desktop test automation.

An ultra-fast, dependency-free Python library for capturing screenshots across multiple monitors on any platform.

A training and inference codebase for embodied foundation models, including data preparation, flow matching, serving, and evaluation tooling supporting the WALL robot series.

High-performance Markdown and MDX processing library for the JavaScript ecosystem, with a Rust core and plugin support for developers building fast content pipelines.

A Swift application framework for Windows that wraps Win32 APIs in a friendly MVC model for building native apps.

A Windows debugging framework library for developers to build debuggers, handling process control, breakpoints, and debug events with an easy API.

Serves as a fast drop-in replacement for the `cn` utility with identical interfaces and byte-consistent output, giving frontend developers a smaller tailwind-merge and clsx alternative with over twentyfold speed improvements.

A cross-platform Qt framework for building frameless windows with custom title bars, snap layouts, and native behaviors.

A Swift application framework for Windows that wraps Win32 APIs in an MVC model, letting developers build native Windows apps in Swift.

An async Rust library for cross-platform Bluetooth Low Energy access, covering scanning, GATT, and notifications on major platforms.

Copy-paste animated component library for landing pages, built with React and Tailwind to help developers quickly assemble polished marketing sections with tasteful motion.

High-performance native rendering SDK for iOS, Android, and HarmonyOS that streams AI-generated UI in real time, supporting interactive cards through 22 built-in components.

Strict subset of Go that transpiles to C with zero runtime and a ported standard library, intended for systems-level developers needing predictable native compilation.

A Flutter plugin that provides real-time GPS fixes, location streams, and background tracking through one simple cross-platform API.

Provides a research-oriented, agent-first reinforcement-learning training framework supporting fully asynchronous multimodal multi-turn training for large-scale experiments scaled to trillion-parameter mixture-of-experts models.

Expert-parallelism communication library for mixture-of-experts training that balances load with dynamic redundant experts while efficiently optimizing collective communication operations and memory layout.

A Swift queue manager built on OperationQueue and GCD for easily creating, chaining, retrying, and scheduling async tasks.

a light-weight Markdown editor based on React. 一款轻量的基于React的markdown编辑器

Avalonia-based text editor (port of AvalonEdit)

A magical Swift persistence library that keeps app state in sync memory and disk with just a few lines.

A cross-platform Bluetooth Low Energy stack offering one unified API for Windows, macOS, Linux, iOS, and Android in C++, Python, Rust, and more.

An open-source modern C++ game engine with a data-oriented Vulkan renderer, multithreading, ECS entities, and tools for high-performance 3D games.

A JavaScript library for JSON data models offering CRDT collaboration, codecs, patches, and reactive utilities for developers.

A Node.js library for getting and setting the desktop wallpaper on macOS, Linux, and Windows, with multi-screen and scaling support.

Native macOS Markdown editing library built on TextKit 2 with SwiftUI bridging, offering live rendering, syntax-highlighted code blocks, and LaTeX support for developers embedding editors.

A header-only C++ CSV parsing library that lets developers easily read and write CSV files with flexible headers, separators, and encodings.

A shared WPF control library offering custom window chrome, behaviors, theming, and controls for .NET desktop developers via NuGet.

A cross-platform PowerShell framework for building web servers, REST APIs, websites, and TCP/SMTP servers entirely in script code.

Zep - An embeddable editor, with optional support for using vim keystrokes.

A Rust library that adds blur, acrylic, mica, and vibrancy effects to desktop application windows.

A fully typed Python wrapper for AutoHotkey that automates mouse, keyboard, windows, hotkeys, and GUI tasks.

A modern Fluent-style UI control and theming library that brings fresh looks to WPF desktop applications.