Microsoft has changed the way how Windows handles Gadgets on the desktop. In Windows Vista, Sidebar provided a containing environment which hosted mini-apps built using XML, DHTML and JavaScript. Now starting with Windows 7, Windows Sidebar is no longer required to run gadgets as these mini DHTML based apps can now be placed directly on the desktop without having to have Windows Sidebar running.
Do you have a HP Printer in your home or work environment? The smart guys over at HP has released a photo printing gadget to make it easier for you to take print outs on the fly.