You see, most iTunes visualizers—including the default one as well as most third-party visualizer plug-ins—can be configured by pressing the appropriate keys on the keyboard.

If you don’t see it sitting right next to the Genius icon, turn the visualizer on in iTunes on your computer and the icon should appear in the Remote app on your device a few seconds later.

ManyEyes is a neat tool that produces compelling visualizations based on user-defined data sets, with data types ranging from statistics tables to any old block of text.

The Atom Visualizer app is in the Play Store, so it can be installed via traditional means. It allows you to place floating models of any atoms on the periodic table in the room, then observe them ...