1. Pixl Preview lets you view your Photoshop® designs on your Android device in real-time.

  2. Pixel perfect, colour perfect design previews from Mac to iOS and Android

  3. PixelServed is the fastest way to preview UI designs created with any creative

  4. Create custom forms with personalized layouts and designs

  5. Compose elaborate interactions and animations easy, and build sensor-aided prototypes without a line of code.

  6. Mockup Builder is a prototyping, mockup and wireframing tool.

  7. DesignerVista is a mockup tool to create mockups for desktop, websites and mobile applications.

  8. MockFlow is an online wireframe tool for software and websites

  9. Wireframing and prototyping with webbased HotGloo. Create interactive, responsive wireframes for web and mobile. Includes 15-day free trial!

  10. FlairBuilder is a user interface prototyping tool for easy authoring of interactive website...

  11. NinjaMock is the faster, better and funnier way of making mockups

  12. Mockup & Wireframe toolkit for PowerPoint