➔ V8 (Chrome, Node, Opera, ...) ➔ SpiderMonkey (Firefox) ➔ Chakra (MS Edge) ➔ Nitro (Safari, Qt 5) ➔ Nashorn (JVM) ➔ DynJS (JVM) Plataformas ➔ Client-side (Navegadores) ➔ Server-side ◆ MongoDB, CouchDB ◆ Node ◆ JXcore (Node.js fork for IoT) ◆ DecafJS (JS Sync, JVM) ◆ Nodyn, RingoJS, PurpleJS (JVM)