当你没有时间来建立一个原型的时候，当客户端需要一张更清晰的图片的时候，当毫无生气的模型无法完整表达出你的思想的时候，来试试Briefs吧。

Briefs for Mac 1.x | Mac Os X | 30 MB

Briefs is the essential app design tool built for a professional design workflow. Lifeless mockups don’t tell the entire story, but you don’t have time to build a prototype. We’ve been there, too. Your clients needed a clearer picture, so give them something to touch.

Requirements:

OS X 10.8 or later, 64-bit processor