Open source. Open possibilities.

Bun is an all-in-one toolkit for JavaScript and TypeScript apps, featuring a fast runtime, bundler, test runner, and package manager in a single executable.

WarriorJS is an open‑source programming game where you write JavaScript or TypeScript to guide a warrior through puzzle‑filled towers, battling enemies and solving logic challenges. It teaches coding while playing.

Whistle is a cross-platform network packet capture and debugging proxy based on Node.js, supporting HTTP, HTTPS, HTTP/2, WebSocket, and TCP packet capture with request/response modification. It offers HTTP, HTTPS, Socks, and reverse proxy modes, includes built-in tools like Weinre, Console, and Composer, and is extensible via rules and plugins. It runs on macOS, Windows, and Linux.

TypeScript ORM for Node.js using Data Mapper, Unit of Work, and Identity Map patterns. Supports multiple SQL and NoSQL databases including PostgreSQL, MySQL, MongoDB, and SQLite.

Harper is an offline, privacy-first English grammar checker built in Rust. It lints documents in milliseconds with a tiny memory footprint, unlike cloud-based or resource-heavy alternatives.

Liferay AI Commerce Accelerator (AICA) is a suite of client extensions that uses generative AI to rapidly generate and deploy commerce data—catalogs, accounts, orders—into Liferay DXP. It offers a zero-dependency CLI, real-time monitoring, dependency-aware generation, and provider-agnostic AI support (OpenAI, Gemini, Claude).

Ditto scans JavaScript/TypeScript repositories with ts-morph, fingerprints each function through an LLM, clusters behavioural duplicates by embedding, then executes pure functions in a sandbox to show where they diverge.

Happy DOM is a JavaScript implementation of a web browser's DOM without a graphical user interface, designed so browser-style code and component tests can run in runtimes like Node.js and Bun.