Open source. Open possibilities.

Solid is a declarative JavaScript library for building user interfaces, compiling JSX templates to real DOM nodes and updating them with fine-grained reactive primitives instead of a virtual DOM.

Watermill is a Go library for building event-driven applications with message streams. It provides a simple interface for pub/sub messaging, supporting Kafka, RabbitMQ, NATS, Redis, SQL, and more.

Leptos is a full-stack, isomorphic Rust web framework using fine-grained reactivity to build declarative UIs with SSR, hydration, and server functions.

marimo is a reactive Python notebook that ensures consistency between code and outputs, stored as pure Python files for git-friendliness and deployability.