Instant Messaging apps are growing in popularity. Popular choices like Slack, WhatsApp, Skype, and others are all built around application functionality, and more often than not it comes down to the design to explain functionality to the users. It’s much like what Steve Jobs once said — the design isn’t how it looks, it is how it works! Matt Thompson has spent a fair amount of time analyzing IM apps, because his free Chat Dashboard PSD is an amazing preview of what modern Instant Messengers could really look like, if everyone spared the time to invest in better design choices. You can easily transform this design into your mobile app prototype and then build on top of it, although it just a dashboard, Matt would be more than happy to help you out in porting this into a full-on chatting application.