They're useful things, widgets. Sometimes they're useful things whose name you've forgotten (can you pass me the widget?) and sometimes they're useful things which don't really have a name, like those credit-sized metal things with the holes punched out of them that are supposed to be able to perform the function of at least fifty-six different tools, or the thing on penknives for getting stones out of horses' hooves.
At some point someone has actually invented something - it's a device that adds nitrogen gas to beer when its can is opened to give it a head - but has been so stymied by the task of thinking up a name for it that it is now known, officially, as a widget.
Various computer bits and pieces are known as widgets, too. As is, peculiarly, an airliner.
As you can see, widget is a small but very useful sort of a word.
A widget of a word, in fact, isn't it.
Word To Use Today: widget. This word was invented in the 1900s. It's an altered form of gadget. Gadget entered the English language in the 1800s, perhaps from the French gâchette, a trigger, from gâche, a staple.