unbash is a fast, zero-dependency bash parser written in TypeScript that produces a typed AST with tolerant, non-throwing error handling, useful for tooling that needs to analyze or lint shell scripts.
tldraw is an open-source SDK for building infinite canvas and whiteboard apps in React, with real-time collaboration and custom shapes built in. It powers whiteboard features in products like ClickUp and Padlet.
Offline-first SQL sync library that gives every client a real local SQLite database synced through a server-side commit log, with optimistic writes, CRDT conflict resolution, and optional per-column encryption.
A build-time compiler for Vite, webpack, esbuild, and Rollup that transforms Zod schemas into zero-overhead validation functions, delivering 2-75x faster validation with no source code changes.
A JavaScript library that brings TeX-style, publication-grade text justification to the web, with Knuth-Plass line breaking, hyphenation, and CJK support.
Open-source, WebGPU-based charting library that renders millions of data points at 60fps with GPU-accelerated zooming, panning, and tooltips.
A lightweight JavaScript runtime with its own hand-built engine, Node-compatible APIs, TypeScript support with no build step, and a VM-isolated sandbox for capability-based security.
A fast Rust-powered Markdown and MDX processing pipeline with a JavaScript plugin layer, now used as Astro's default Markdown engine for faster builds.
An open-source connection pooler, load balancer, and sharder for PostgreSQL that scales reads and writes horizontally without changing your application code.
A general-purpose sync engine for the web from the makers of Replicache. Zero reached its 1.0 stable release in 2026, offering query-driven, zero-latency client-server sync.
Open-source model router that sits in front of the Anthropic, OpenAI, and Gemini APIs and sends each request to the cheapest model that can handle it, cutting inference costs 40-70% with just an endpoint change.
An API to search, scrape, and crawl the web at scale, turning any page into clean Markdown or structured data for AI agents and RAG pipelines.
Open-source billing and monetization platform for developers — subscriptions, one-time purchases, and usage-based pricing with a built-in developer dashboard.
Beautiful and powerful syntax highlighter for code blocks, powered by TextMate grammars with support for 100+ languages and themes.
Type-safe form validation library for React and Remix with progressive enhancement and full server action support.
A lightweight, session-based authentication library for TypeScript and JavaScript. Lucia handles session management so you can focus on building your app with full control over the user model.
A lightweight JavaScript library that gives you access to AJAX, CSS Transitions, WebSockets, and Server Sent Events directly in HTML using attributes. Build modern, dynamic UIs without writing JavaScript.
JavaScript and TypeScript library for building state machines and statecharts. Helps manage complex application logic with a visual, predictable approach to state management.
Lightweight TypeScript ORM for SQL databases with a type-safe query builder that feels like writing SQL. Works seamlessly with serverless environments and supports PostgreSQL, MySQL, and SQLite.
A powerful library for generating massive amounts of realistic fake data for testing and development, including names, addresses, dates, products, and more.
A TypeScript-first, modular schema validation library that is fully tree-shakable and significantly more lightweight than alternatives. Ideal for validating forms, API responses, and data structures.
