Widgets are small, continually running app windows. Widgets from different developers can check your mail, display your calendar, show your music selection, check off your grocery list, display pictures, and notify you of new Twitter posts. They can have transparent backgrounds, and some are designed to have different windows stacked on each other that you can swipe to rearrange. Often, tapping a widget launches the full app.
Figure 7–2 shows some of the widgets available by default in Honeycomb. You can download many more widgets, and many developers package widget views with their apps.