Eclipse Orion Online IDE Provides Effective Tools for Web Development
Like much of Eclipse itself, Orion is built with extensibility in mind. The entire back-end is built to be both extensible and loosely coupled so you can actually scale it down to a subset of components. That means you can choose to only use the components you need for your development environment. Right now, at the stage it's in, this doesn't seem totally necessary, but I would expect later on we're going to see many different builds of Orion that support different languages and platforms in the same way that the desktop version of Eclipse has many different editions.