Objective-J
Objective-J adds traditional inheritance and Smalltalk/Objective-C message calls to JavaScript. Objective-J shares the same relationship with JavaScript as Objective-C shares with C, so it is a strict superset of JavaScript. Programs written in Objective-J are almost identical to their counterpart written in Objective-C. The Objective-J compiler is written in JavaScript and programs written in Objective-J may be directly compiled on the client side (typically in the web browser) by the Objective-J compiler through the Objective-J runtime.
Read more about this topic: Cappuccino (application Development Framework)