library
LiteRT, successor to TensorFlow Lite. is Google's On-device framework for high-performance ML & GenAI deployment on edge platforms, via efficient conversion, runtime, and optimization
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Haptic feedback for the mobile web. Supports React, Vue, and Svelte.
A minimal dependency implementation of Apache Parquet.
A parser for the Apache Parquet file format, optimized for minimal dependencies and great performance.
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🌳 Tiny & elegant JavaScript HTTP client based on the Fetch API.
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The AI Operator Living in Your Web Page. JavaScript in-page GUI agent. Control web interfaces with natural language.
🪄One line of code, turns your website into an AI-native app. Users give natural language commands, AI handles the rest.
Touch-to-grab context tool for React Native UI changes.
Bridge the context gap: point at the exact native UI element, capture precise source context, and hand it to your coding agent without guesswork.
The Monster Terminal UI Kernel for Rust.
Minimal, high-performance terminal UI kernel with diff-based rendering, inline mode, and RAII terminal cleanup.
The version control system for AI agents. Embeddable version control system for AI agents.
Lix is a version control system that can be imported as a library. Use it to, for example, enable human-in-the-loop workflows for AI agents like diffs and reviews.
Bringing stdlibs of other programming languages to TypeScript for fun.
Locutus is ~500 TypeScript implementations of standard library functions from PHP, Go, Python, Ruby, C, and more. Each function is individually importable and tree-shakeable.
Most of these started as rainy Sunday afternoon puzzles. Some are genuinely useful. Some are just fun to write. All of them are a way to learn how different languages solve the same problems.
Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
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Full NumPy, in TypeScript/JavaScript (94% coverage).
The most comprehensive NumPy implementation for TypeScript and JavaScript. Write numerical computing code with the same API you already know from Python — fully type-safe, tree-shakeable, and validated against NumPy itself.
Passive API Contract Monitoring for PHP 8.3+. Detects breaking changes, json schema drift, and unexpected structural modifications in third-party REST APIs via probabilistic inference.
Passive API Contract Monitoring for strictly typed PHP 8.3+.
Sentinel silently monitors the JSON payloads returning from the third-party APIs you consume, automatically infers their structural JSON Schema, and detects when they change unexpectedly (drift).
A fast, lightweight, and responsive masonry grid layout library.
Minimal PDF creation library. <400 LOC, zero dependencies, makes real PDFs.
A TypeScript implementation of the age file encryption format, available as an npm package or as a bundled .js file.
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Strongly typed queries for PostgreSQL and TypeScript
pg-typesafe generates TypeScript types for PostgreSQL queries. It does so with no runtime dependencies, and zero additional verbosity.
Live Activities & Widgets in React Voltra lets React Native developers build native Live Activities and widgets on iOS and Android using React components — no Swift or Kotlin required. It supports hot reload, push updates on iOS, and a config plugin that wires everything automatically.
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Access the system clipboard (copy/paste).
Cross-platform. Supports: macOS, Windows, Linux (including Wayland), OpenBSD, FreeBSD, Android with Termux, and modern browsers.
raylib is a simple and easy-to-use library to enjoy videogames programming.
raylib is a simple and easy-to-use library to enjoy videogames programming.
raylib is highly inspired by Borland BGI graphics lib and by XNA framework and it's especially well suited for prototyping, tooling, graphical applications, embedded systems and education.
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The PDF library TypeScript deserves
Parse, modify, sign, and generate PDFs with a modern TypeScript API. The only library with incremental saves that preserve digital signatures.
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pypdf is a free and open source pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files. It can also add custom data, viewing options, and passwords to PDF files. pypdf can retrieve text and metadata from PDFs as well.
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La classe Vanilla JS universelle pour Google Maps.
MagixMaps est une bibliothèque JavaScript légère, performante et sans dépendances (Vanilla JS), conçue pour intégrer l'API Google Maps (version 2026) dans tout projet web.
There's a different way to put pictures in QR codes. Instead of scribbling on redundant pieces and relying on error correction to preserve the meaning, we can engineer the encoded values to create the picture in a code with no inherent errors.
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Beautiful, open source, WebGPU-based charting library.
ChartGPU is a TypeScript charting library built on WebGPU for smooth, interactive rendering—especially when you have lots of data.
JSON formatter that produces highly readable but fairly compact output.
FracturedJson is a family of utilities that format JSON data in a way that's easy for humans to read, but fairly compact. Arrays and objects are written on single lines, as long as they're neither too long nor too complex. When several such lines are similar in structure, they're written with fields aligned like a table. Long arrays are written with multiple items per line across multiple lines.
🔱 A dynamic SQL query builder for MySQL, Postgres and SQLite.
SeaQuery is a query builder to help you construct dynamic SQL queries in Rust. You can construct expressions, queries and schema as abstract syntax trees using an ergonomic API. We support MySQL, Postgres and SQLite behind a common interface that aligns their behaviour where appropriate. MS SQL Server Support is available under SeaORM X.
The type-safe SQL query builder for TypeScript.
Kysely (pronounce “Key-Seh-Lee”) is a type-safe and autocompletion-friendly TypeScript SQL query builder. Inspired by Knex.js. Mainly developed for Node.js but also runs on all other JavaScript environments like Deno, Bun, Cloudflare Workers and web browsers.
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Barcode scanning for web apps.
STRICH is a JavaScript library for real-time, 1D/2D barcode scanning in the web browser.
Create and share context across Astro components.
Astro Context is a library designed to simplify the creation and sharing of data across components in Astro.
Complete media toolkit.
Pure TypeScript media toolkit for reading, writing, and converting video and audio files, directly in the browser.
A JavaScript library for reading, writing, and converting video and audio files. Directly in the browser, and faster than anybunny else.
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🗄 Zero dependency streaming tar parser and writer for every JavaScript runtime. Built with the browser-native Web Streams API for performance and memory efficiency.
Lightweight type coercion library.
Of Coerce! is a lightweight, near-zero overhead alternative to Zod and Valibot.
Unlike these libraries, Of Coerce! focuses on a single task: ensuring the data corresponds to the types.
It uses built-in JavaScript features to coerce whatever you pass to it, which makes it the fastest and the most lightweight solution (full library is 381B!).
Actor-based state management & orchestration for complex app logic. XState is a state management and orchestration solution for JavaScript and TypeScript apps.
It uses event-driven programming, state machines, statecharts, and the actor model to handle complex logic in predictable, robust, and visual ways. XState provides a powerful and flexible way to manage application and workflow state by allowing developers to model logic as actors and state machines. It integrates well with React, Vue, Svelte, and other frameworks and can be used in the frontend, backend, or wherever JavaScript runs.
JavaScript Iceberg Client.
Icebird is a library for reading Apache Iceberg tables in JavaScript. It is built on top of hyparquet for reading the underlying parquet files.
The Active Reliability Layer for AI Agents. Catch failures, teach fixes, and automate reliability.
Steer is an open-source Python library that intercepts agent failures (hallucinations, bad JSON, PII leaks) and allows you to inject fixes via a local dashboard without changing your code.
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Unterminated Block Parsing.
Remend is a lightweight, standalone preprocessor that completes incomplete Markdown syntax.
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Flexible schedule management for modern Laravel applications. The missing calendar management for Laravel.
A comprehensive calendar and scheduling system for Laravel. Manage availabilities, appointments, blocked times, and custom schedules for any resource—doctors, meeting rooms, employees, and more.
Elegant types in Ruby.
LowType introduces the concept of "type expressions" in method arguments. When an argument's default value resolves to a type instead of a value then it's treated as a type expression. Now you can have types in Ruby in the simplest syntax possible
Refined & Responsive Scroll Area. The Adaptive Scroll Area for Modern UIs
A responsive scroll area that feels native on touch devices, offering custom styling and enhanced interactions where it matters most.
An open source library to build node-based UI with Angular 16+.
ngx-vflow is an Angular library for creating node-based applications. It aims to assist you in building anything from a static diagram to a visual editor. You can utilize the default design or apply your own by customizing everything using familiar technologies.
Svelte Plotting Framework.
The best visualizations are built with Svelte. A Svelte-native visualization framework based on the layered grammar of graphics principles.
interactive, collaborative html elements with a single data attribute.
playhtml is an open-source library for designing communal web experiences by enhancing web elements with real-time, collaborative interactivity.
Why does the internet feel lonely when we increasingly spend much of our time on it? I think it's because most of the internet is a solitary experience, by design: personal algorithmic feeds, content-focused websites, no indicator of who else is here with us right now.
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A fast, framework-agnostic undo/redo core powered by Mutative JSON Patch.
A fast, framework-agnostic undo/redo library that stores only changes, not full snapshots.
Travels gives your users the power to undo and redo their actions—essential for text editors, drawing apps, form builders, and any interactive application. Unlike traditional undo systems that copy entire state objects for each change, Travels stores only the differences (JSON Patches), making it 10x faster and far more memory-efficient.
Quickly rewrite git repository history (filter-branch replacement).
git filter-repo is a versatile tool for rewriting history, which includes capabilities I have not found anywhere else. It roughly falls into the same space of tool as git filter-branch but without the capitulation-inducing poor performance, with far more capabilities, and with a design that scales usability-wise beyond trivial rewriting cases. git filter-repo is now recommended by the git project instead of git filter-branch.
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Next.js SDK for signing in with Auth0.
The Auth0 Next.js SDK is a library for implementing user authentication in Next.js applications.
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Async-friendly QUIC implementation in Rust.
Quinn is a pure-Rust, async-compatible implementation of the IETF QUIC transport protocol. The project was founded by Dirkjan Ochtman and Benjamin Saunders as a side project in 2018, and has seen more than 30 releases since then. If you're using Quinn in a commercial setting, please consider sponsoring the project.
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An open-source engine for P2P streaming of live and on demand video directly in a web browser HTML page.
P2P Media Loader is an open-source JavaScript library that uses modern browser technologies — like HTML5 video and WebRTC — to enable peer-to-peer (P2P) media delivery. It integrates seamlessly with popular HTML5 video players and requires no additional browser plugins or add-ons. Try the demo to see it in action.
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A Golang Matrix framework. Used by gomuks, go-neb, mautrix-whatsapp and others.
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OpenTUI is a library for building terminal user interfaces (TUIs).
OpenTUI is a TypeScript library for building terminal user interfaces (TUIs). It is currently in development and is not ready for production use. It will be the foundational TUI framework for both opencode and terminaldotshop.
Visually explore, understand, and present your data.
By using easy-to-understand views, SandDance helps you find insights about your data, which in turn help you tell stories supported by data, build cases based on evidence, test hypotheses, dig deeper into surface explanations, support decisions for purchases, or relate data into a wider, real world context.
A tiny, dependency-free computer vision library in C for embedded systems, drones, and robotics.
Grayskull is a minimalist, dependency-free computer vision library designed for microcontrollers and other resource-constrained devices. It focuses on grayscale images and provides modern, practical algorithms that fit in a few kilobytes of code. Single-header design, integer-based operations, pure C99.
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Rust implementation of the H3 geospatial indexing system.
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Version control for your data. Automerge is a local-first sync engine for multiplayer apps that works offline, prevents conflicts, and runs fast.
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audio waveform player JavaScript library.
Wavesurfer.js is an open-source audio visualization library for creating interactive, customizable waveforms.
Wavesurfer.js is an interactive waveform rendering and audio playback library, perfect for web applications. It leverages modern web technologies to provide a robust and visually engaging audio experience.
Prism is a lightweight, extensible syntax highlighter, built with modern web standards in mind. It’s used in millions of websites, including some of those you visit daily.
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A resilient Chord implementation in Go.
Concord is a resilient implementation of the core Chord protocol in Go. The protocol enables distributed key lookup in a peer-to-peer network using consistent hashing, a technique for evenly distributing keys across multiple nodes while minimizing reassignments when nodes join and leave. Chord allows nodes in this dynamic network to efficiently determine which node is responsible for a given key. While Chord is often conflated with its common use case, Distributed Hash Tables, this library implements the more general lookup protocol, allowing you to build DHTs or other distributed applications on top of it.
A regular expression to match all Emoji-only symbols as per the Unicode Standard.
emoji-regex offers a regular expression to match all emoji symbols and sequences (including textual representations of emoji) as per the Unicode Standard. It’s based on emoji-test-regex-pattern, which generates (at build time) the regular expression pattern based on the Unicode Standard. As a result, emoji-regex can easily be updated whenever new emoji are added to Unicode.