ViewFlux!

Lucidchart is an online diagram and flowchart software that supports Microsoft Office Visio import and can work on any operating system. The easiest way to draw flowcharts, wireframes, UML diagrams, network diagrams, mind maps, iPhone mockups, site maps and more. Work together in real time with your team and clients! Along with the online version, Lucidchart also has a downloadable solution that runs on Mac, Windows and Linux; this enables offline editing at any time! »

Lucidchart is an online diagram and flowchart software that supports Microsoft Office Visio import and can work on any operating system. The easiest way to draw flowcharts, wireframes, UML diagrams, network diagrams, mind maps, iPhone mockups, site maps and more. Work together in real time with your team and clients! Along with the online version, Lucidchart also has a downloadable solution that runs on Mac, Windows and Linux; this enables offline editing at any time! »

InVision's prototype tool lets you create interactive wireframes and high-fidelity prototypes. Share your work and get instant feedback right on-screen.

Free web and mobile mockup tool.Transform your design and mockups into clickable interactive applications. Perfect way to validate ideas faster with lean startup thinking.

Build your idea into a product.Design and programming skills are no longer necessary to create a product. With STUDIO, you can make your idea into a real product regardless of your skill and knowledge.

SavahApp is a collaborative platform that streamlines feedback right to your design screen that allows designers to create high-fidelity prototypes for web and mobile apps without writing a single line of code. With Savah, designers, design agencies and businesses can transform their designs into attractive interactive prototypes and mock-ups for web and mobile apps. Users can share these prototypes with a single click to their team / clients to get their visual feedback right on the design screen. No more emailing back and forth your design files you can effortlessly invite your design team/clients to your projects where they can review and contribute. »

HotGloo is a UX, wireframe and prototyping tool designed to build wireframes for web, mobile and wearables. HotGloo helps to visualize planning processes, build and test drive interactions very easily. Create and share fully interactive prototypes with your team and clients and gather feedback on the process. From prototypes of the next award winning app to huge e-commerce wireframe shop solutions, HotGloo is the perfect match for every web worker.

Specfox is the first tool to address the tedious process of writing website specifications, which is often frustrating and time-consuming. You shouldn't be spending hours trying to explain developers design features and creating ugly descriptions in software which was not built for that purpose. Specfox helps you create, edit & manage design specifications easily and pain-free.

Use your existing WordPress site to get feedback on your design projects. Upload your design images, wireframes, mockups, logo sketches, photography and more. Gather comments directly on top of your designs. Get clear approval and move forward with the project.

Markly is a measure and design spec plugin/extension for Photoshop & Sketch. It is made for modern web designers & app front-end developers. You can add specification marks by simple clicking and dragging. Coordinate, dimensions, distance or fonts, no matter what and where you want. http://marklyapp.com

Give your ads the stage they deserve. Upload your ads and present your ads to your client. And go one step further: demo your ads inside real websites. No email attachments for your clients anymore, but an overview at a glance.

Easy to use tool for graphic annotations, that allows taking quick feedback about graphic content.