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

Designed specifically for mobile, Proto.io can simulate everything an app can do. That includes interactive touch gestures, screen transitions and animating any UI item in a prototype. It is perhaps the only mobile prototyping tool that allows users to create realistic, sharable prototypes that work as a real app should and experience their prototype on the actual device. Proto.io is also the first prototyping tool to ever include custom device support, to allow prototyping for anything with a screen interface - from SmartTVs to refrigerators. »

ViewFlux allows you to capture feedback, create clickable prototypes from your designs & collaborate seamlessly with your clients.Share fully interactive prototypes, chat & collaborate with team mates and share the output with clients.

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.

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.

What's next after wireframes? Visual Design and Notism. With Notism you can discuss, experience and share design work. Iterate faster and create better websites & apps - the lean way.

The most productive way to share designs, gather useful feedback and get approval

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

AppDemoStore.com is the place where you can showcase your apps online.

Presentator is a free web application that allows you to present your designs in an easy, organized and interactive way.