FlowVella (was Flowboard) allows you to create beautiful interactive presentations that bring your ideas to life on Mac, iPad, and the Web. FlowVella is a re-imagining of presentation software. It is simple, elegant, fast, and has been designed specifically for OS X and iOS. Presentations can be viewed by anyone, on any device!

FlowVella uses cloud-based storage and comes with free 500mb/month upload quota. There are a couple of premium features that can be purchased to bring additional functionality to this app including expanded analytics, increased cloud upload quota, and password-protected FlowVellas.