Moqups is a streamlined web app that helps you create and collaborate on
wireframes, mockups, diagrams and prototypes.
* Crisp, ready-to-use Stencils for all popular use-cases
* Built-in library with thousands of popular Icon Sets
* Drag and drop to import Images from your desktop or apps
* Extensive range of Fonts and styling options
* Fast, intuitive, and precise Object Editing
* Powerful, flexible, and scalable Page Management
Go from diagrams, wireframes and prototypes without switching apps or updating across platforms.
Premium plans start at $13/month, check them out here: https://moqups.com/pricing