Fluid ui is a prototyping tool for mobile development that helps designers complete the design of product. You can create prototypes for mobile ios android and web applications. Mockplus is a wireframing prototyping tool that showed up in the recent two years.
I spent a few days using this mockup tool and i.
Get every component you need for your next website mockup. Diverse library of design elements. Drag drop symbols from its libraries add images or post notes export as a png are all of its features adding up to just just enough functionality to create a decent mockup. Project sharing png and pdf export.