Objective-j is an application development language and framework that allows for plugin-free development of web 2.0 apps using JavaScript. It implements language features through a dynamic pre-processor for JavaScript. No HTML or CSS is required. Objective-j mixes with JavaScript and uses data types like Objective-j arrays with JavaScript and vice versa. The framework emulates Cocoa elements like CoreGraphics and CoreAnimation, and is called Cappucino. A premier demo is the 280Slides presentation app available at 280Slides.com.