I am in the process of creating BRDs. As a part of BRD, we have decided to have mockups for our developers. We develop QV appn for our customers and are in business for over 6 years. There are many mockup tools for website development. It is quite challenging to find a mockup tool for BI. I want to know if there is any special tool recommended by QV or if there is any tool used by other QV teams.