ProtoShare is a collaborative prototyping application. You can use ProtoShare to discuss and refine wireframes, design comps, and even live websites with your project stakeholders.
ProtoShare is a web application, so there is nothing to download or install. You access it by visiting a special URL, like http://mycompany.protoshare.com, in your web browser. Although ProtoShare runs in a web browser, it has many of the features you would expect in a desktop application, such as rich drag-and-drop, keyboard shortcuts, and right-click menus.
Platform Support — ProtoShare review is supported in Chrome, Safari 5+, Firefox and IE9+ on Macs, and on PCs running Windows 7, Vista and XP.