Palm - Project Ares
According to Palm "Project Ares is the first mobile development environment hosted entirely in a browser, lowering the barriers for web developers to jump into mobile development."
Project Ares is the first mobile development environment for Palm's WebOS, hosted entirely in a browser
browser based IDE for WebOS
Like webOS, Project Ares embodies Palm's belief that the future of mobile will be built on the web. Project Ares aims to enable a next-generation mobile development workflow, in which developers move quickly and seamlessly from editing in a browser, to debugging on a device, to selling applications in Palm's App Catalog or on the web.