This document provides an introduction to Eclipse Che, a cloud integrated development environment (IDE) and software development kit (SDK) for building cloud-based IDE extensions. It discusses how Che aims to make developer workspace configuration repeatable and distributes developer services through browser-accessible microservices and plugins. The document outlines Che's architecture, components, roadmap, and relationship to the broader Eclipse Cloud Development initiative. It also provides information on getting started with Che and developing IDE extensions for it.