Proto.io is a web platform enabling users to create fully interactive mobile app prototypes.
Marvel is a free prototyping and collaboration tool that lets designers transform their files into interactive, shareable prototypes viewable on any device and get feedback.
Zeplin is a collaboration application for UI designers and front-end developers.
Pixate is a new platform for mobile interaction design. With it, you can create sophisticated interactive native prototypes without code.
Balsamiq is a wireframing and mockup tool that allows users to sketch and share user interface mockups for web, desktop and mobile apps.
UXPin allows product teams and designers to build low and high-fidelity, interactive, realistic web and mobile wireframes and prototypes.
Canva facilitates graphic design by providing a drag-and-drop design tool and a library of stock photographs, graphic elements and fonts.
Dribbble is a community of designers sharing screenshots of their work, process, and projects.
InVision allows designers to build interactive, high-fidelity, realistic web and mobile mockups and prototypes.
Picmonkey allows users to utilize tools in order to edit a variety of aspects of any given image.