FrameBox:在线轻量级框架制作工具是一个可以让你轻松绘制用户界面草图、单元框架，交互界面图的在线工具，支持拖拽操作，尺寸调整等简易的绘制功能，让你快速的完整界面设计并分享给客户预览。Lightweight online tool for creating and sharing mockups (wireframes). Easy, fast and free in use.framebox.org
Pidoco is a powerful web-based prototyping software for rapidly creating clickable wireframes and interactive UX prototypes for web and mobile applications.pidoco.com/en
