Martin Lippert introduces Eclipse Orion, an open source platform for cloud-based software development. Orion provides a lightweight and ultra-fast editor, file navigation, search, and running unit tests within a web browser. It is built entirely with JavaScript and supports features like content assist, folding, and Git integration. Orion is modular and reusable - for example, Scripted is a lightweight JavaScript editor that can run in browsers. Orion addresses innovation happening on the web but also faces challenges of offline use and transferring existing tooling to the browser.