Yahoo! Widgets is a free application platform for Mac OS X and Microsoft Windows. Widgets provide access to your favorite information without having to search for it.

Google Gadgets work with the Google desktop to provide one-glance access to personalized and up-to-the-minute information. Google Gadgets are interactive mini-applications that can be placed anywhere on your desktop or on your iGoogle page to show you new email, weather, photos and personalized news. Other gadgets include the clock, calendar, scratch pad, to do list and many more. You can choose to add the gadget to your desktop, your iGoogle page, or both.

The Pollen.com desktop add-ons provide a 1 -day and 4-day Pollen level forecasts for your zip code as given by Pollen.com. You can also learn about the predominant pollen for the day and get more information about today's pollen forecast.