Open Source Projects We Love

The library for web and native user interfaces. Hooks, components, and the virtual DOM — the foundation of modern frontend.

The React framework for the web. App Router, server components, static generation, and edge runtime — powers this very site.

TypeScript is a superset of JavaScript that compiles to clean JS output. Generics, type inference, and strict type checking.

A utility-first CSS framework for rapidly building custom designs. Flexbox, grid, animations, and responsive utilities.

A cross-browser library of CSS animations. Just add classes for bounce, fade, slide, and 70+ animation effects.

A production-ready motion library for React. Spring animations, gestures, layout animations, and scroll-triggered effects.

State-of-the-art machine learning for PyTorch, TensorFlow, and JAX. Thousands of pretrained models for NLP, vision, and audio.

Build context-aware reasoning applications. Chains, agents, RAG pipelines, and tool use — the LLM application framework.

The open-source AI-native embedding database. Store, search, and retrieve embeddings with metadata filtering.

A library for efficient similarity search and clustering of dense vectors. HNSW, IVF, and PQ indexes at billion scale.

The official Python library for the OpenAI API. Embeddings, chat completions, function calling, and streaming.

High-throughput and memory-efficient LLM inference engine. PagedAttention, continuous batching, and KV cache optimization.

LLM inference in C/C++. Run LLaMA, Mistral, and other models locally on CPU/GPU with quantization.

Machine learning in Python. Classification, regression, clustering (K-Means), Naive Bayes, and model evaluation tools.

A Python scikit for building and evaluating recommender systems. SVD, KNN, collaborative filtering, and matrix factorization.

The distributed version control system. Branching, merging, rebasing, and the DAG-based object model that powers GitHub.

The official Stripe Node.js library. Payment intents, checkout sessions, webhooks, and subscription billing.

A DNS server written in Go. Plugin-based architecture, service discovery, and Kubernetes DNS — DNS internals in practice.

Make locally-trusted development certificates. Zero-config HTTPS for localhost — see TLS/SSL in action.

A robust, full-featured toolkit for TLS/SSL and general-purpose cryptography. RSA, AES, certificates, and key management.

Data-Driven Documents. The gold standard for interactive data visualization in the browser — SVG, Canvas, and HTML.

The source of MDN Web Docs — the definitive reference for HTML, CSS, JavaScript, DOM APIs, and web platform standards.