Moqups is a nifty HTML5 App used to create wireframes, mockups or UI concepts, prototypes depending on how you like to call them. They try to make things simple and fairly intuitive so you can unleash your creativity without any obstacles. Just drag-and-drop and edit the contents the way you want. Stencils are objects that mimic various user interface elements. Some have editable content and other have configurable properties like color, shape, icon, states etc. Some features: type anywhere to search for stencils, upload your own images, connect pages with links and hotspots and export or publish to PDF/PNG.