"Invision is prototyping, collaboration & workflow platform."

Interaction design, often abbreviated IxD, is the practice of designing interactive digital products, environments, systems, and services. wikipedia.org

Axure RP Pro is a wireframing, rapid prototyping, and specification software tool aimed at web and desktop applications. It offers capabilities typically found in diagramming tools like drag and drop placement, resizing, and formatting of widgets. wikipedia.org

User experience design (UXD or UED) is the process of enhancing customer satisfaction and loyalty by improving the usability, ease of use, and pleasure provided in the interaction between the customer and the product. wikipedia.org

Adobe Photoshop is a graphics editing program developed and published by Adobe Systems Incorporated. wikipedia.org

Adobe Illustrator is a vector graphics editor developed and marketed by Adobe Systems. wikipedia.org

Web design is the process of planning and creating a website. Text, images, digital media and interactive elements are used by web designers to produce the page seen on the web browser. wikipedia.org

Cascading Style Sheets (CSS) is a style sheet language used to describe the presentation (that is, the look and formatting) of a document written in a markup language. wikipedia.org

Usability testing is a technique used in user-centered interaction design to evaluate a product by testing it on users. This can be seen as an irreplaceable usability practice, since it gives direct input on how real users use the system.