From the blurb "Building a Siena app is as easy as editing a PowerPoint presentation or Excel spreadsheet. You place some visuals on a canvas. You hook them up

From the blurb "Building a Siena app is as easy as editing a PowerPoint presentation or Excel spreadsheet. You place some visuals on a canvas. You hook them up to your data or favorite services. You customize how your app looks and works. Then, if you need special logic and intelligence, you write some Excel-like expressions. You can use your app immediately, or share it with colleagues or the world." So aimed at non-programmers but with some modern stuff like the ability to talk to restful services.