Mockup Web App. It is a desktop based application can be used to prototype for any mobile and web apps. Sketch and annotate mockups exports to word pdf html or images.
Flud ui is another web based app that allows creating mockups in a browser. Moqups makes it easy to quickly wireframe and design your website or mobile app. Add interactivity to create prototypes and share them with your collaborators.
The collection of widgets contain the most common objects that are used in web and mobile design.
Team collaboration link multiple mockups together. Fluid ui provides a list of ready to use widgets. Mockplus is a quick wireframe tool which is created by the fast growing startup jongde software llc. Mockingbird lets you create interfaces quickly with its drag and drop editor.
