A simple and composable way to validate data in JavaScript (and TypeScript).

Fast Rust bundler for JavaScript/TypeScript with Rollup-compatible API.

LLRT (Low Latency Runtime) is an experimental, lightweight JavaScript runtime designed to address the growing demand for fast and efficient Serverless applications.

Zero-runtime CSS in JS library

The OS for your personal finances

Catalyst UI is a component library built on top of Radix UI Primitives and styled with Tailwind CSS

Browser-based ePub reader

Base64 encoding and decoding for ArrayBuffer

A JSON-like data structure (a CRDT) that can be modified concurrently by different users, and merged again automatically.

Tool for analyzing TypeScript types of npm packages

Pure Javascript OCR for more than 100 Languages 📖🎉🖥

A natural language interface for computers

💌 Build and send emails using React

The future of APIs

The visual editor for React

Open-source tools for prompt testing and experimentation, with support for both LLMs (e.g. OpenAI, LLaMA) and vector databases (e.g. Chroma, Weaviate, LanceDB).

🪢 Open source LLM engineering platform: Observability, metrics, evals, prompt management, playground, datasets. Integrates with LlamaIndex, Langchain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

Generative Agents: Interactive Simulacra of Human Behavior

Optimize React performance and make your React 70% faster in minutes, not months.

React components to build charts and dashboards

Type-safe, K-sortable, globally unique identifier inspired by Stripe IDs

pgTyped - Typesafe SQL in TypeScript

Small JWT library using the Web Crypto API

A node.js module to find the timezone based on gps coordinates

JavaScript Library for Timezone Lookup by Location

Yet another simple Postgres SQL parser

PostgreSQL Query Parser for Node.js

A collection of awesome adblockers and related tools.

A list of engineering manager resource links.