Widget may refer to:

• Widget (economics), a placeholder name for an object or, more specifically, a mechanical or other manufactured device
• In computing:
  • Widget engine, such as Dashboard widgets for Apple's Mac OS X v10.4, Windows Vista Sidebar, KlipFolio, Yahoo! Widgets (aka Konfabulator), iGoogle, Google Desktop or netvibes.
  • GUI widget, a component of a graphical user interface that the user interacts with
  • Web widget, a third party item that can be embedded in a web page
  • Mobile widget, a third party item that can be embedded in a mobile phone
• Widget (beer), the nitrogen widget in cans and bottles of beer
• Widget (comics), a character in Marvel Comics
• Widget (TV series), a 1990s animated television series

Yahoo! Widgets is a free application platform for Mac OS X and Microsoft Windows. The software was previously called Konfabulator, but after being acquired by computer services company Yahoo! it was rebranded. The name Konfabulator was subsequently reinstated as the name of the underlying rendering engine. The engine uses a JavaScript runtime environment combined with an XML interpreter to run small applications referred to as Widgets, and hence is part of a class of software applications called widget engines.