ForeUI can create interactive prototype of your desired website or software with drag and drop. You can run your prototype in your browser. You can define the behavior of each element, so that your prototype can provide real user experience. The simulation is DHTML based; you can also upload the simulation to your website and make it work as part of your site. The simulation is also skinnable, the look and feel of simulation will be the same with current UI theme of the prototype. ForeUI provides various UI themes for mockups, including Wireframe, Windows XP and Mac OS X themes. You can switch the UI themes at anytime, that means you can design the UI with Wireframe theme and preview it with XP or Mac theme later.