Open source. Open possibilities.

A glossary explaining functional programming jargon in simple terms with JavaScript examples.

Lichess is a free, open-source online chess platform offering real-time play, tournaments, analysis, training tools, and multilingual support. Built with Scala and TypeScript, it hosts billions of games and supports community contributions.

flub.js is a tiny DOM microframework with reactive signals, no virtual DOM or compiler, and typed component factories for building browser applications.

NeoHaskell is a beginner-friendly Haskell dialect designed for productivity, with tooling, testing, and documentation built-in for easy app development.

Effect-native agent execution kernel providing sessions, runs, turns, steering, follow-ups, and typed lifecycle events on top of Effect AI, with pluggable transports, batteries, and durable execution.