1. Using Balsamiq Mockups feels like you are drawing, but its digital, so you can tweak and rearrange...

  2. Turn sketches, mockups and designs into web, iPhone, iOS, Android and Apple Watch app prototypes.

  3. The prototyping and specification software used by 87% of the Fortune 100. Beyond mockups, design interactive prototypes for business solutions, websites, and applications.

  4. Single-user mockup / wireframing / diagramming tool

  5. Prototyping and collaboration for design teams

  6. Diagramo is an online flowchart software - diagrams (create, edit and share)

  7. LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.

  8. POP helps you make interactive prototype with ease. If you can draw, you can design apps.

  9. Composite is a brand new way of creating interactive prototypes. It automatically connects to your Photoshop® document and converts your mockups into interactive prototypes in seconds. No need to export images or maintain tons of hotspots.

  10. Create stunning mockups that make your design standout.

  11. Briefs is the essential app design tool built for a professional design workflow.

  12. Blueprint is an UI design application for iPad and iPhone