runtime

Node.js JavaScript runtime ✨🐢🚀✨

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

TypeScript execution and REPL for node.js

⚡️ TypeScript Execute | The easiest way to run TypeScript in Node.js

Mono open source ECMA CLI, C# and .NET implementation.

Open-source agentic workspace enterprises can make their own. Connect the systems you already run — 100+ integrations, MCP, chat tools, apps, browser, local files — with shared memory. Any agent (Claude Code, Codex), any model, or BYOK. Set up in clicks, not months. Local-first: your data never leaves your machines.

The agent platform built on sync.

ChakraCore is an open source Javascript engine with a C API.

The modular and type safe schema library for validating structural data 🤖

Boa is an embeddable Javascript engine written in Rust.

Ultra-lightweight JavaScript engine for the Internet of Things.

A runtime developer console and IRB alternative with powerful introspection capabilities.

A library for patching, replacing and decorating .NET and Mono methods during runtime

wazero: the zero dependency WebAssembly runtime for Go developers

WebAssembly Micro Runtime (WAMR)

Declarative data automation language and Go runtime for structured extraction workflows.

Super-fast/easy runtime validators and serializers via transformation

A small and fast async runtime for Rust

Lunatic is an Erlang-inspired runtime for WebAssembly

Enterprise AI Platform with guardrails, MCP registry, gateway & orchestrator