从这里看到一个在线原型设计工具 Mockingbird 是基于 Cappuccino 开发的一个在线原型设计工具。 确实很酷，280 Slides也是用这个工具做的。 研究了下，它是用Objective- J来做的，好像是类似GWT一样的东西，挺麻烦的
Cappuccino is an open source application framework for developing applications that look and feel like the desktop software users are familiar with. Cappuccino is built on top of standard web technologies like JavaScript, and it implements most of the familiar APIs from GNUstep and Apple’s Cocoa frameworks. When you program in Cappuccino, you don’t need to concern yourself with the complexities of traditional web technologies like HTML, CSS, or even the DOM. The unpleasantries of building complex cross browser applications are abstracted away for you. Cappuccino was implemented using a new programming language called Objective-J, which is modelled after Objective-C and built entirely on top of JavaScript. Programs written in Objective-J are interpreted in the client, so no compilation or plugins are required. Objective-J is released alongside Cappuccino in this project and under the LGPL.