runas date

Give it two dates and/or times, and it tells you the length of time between them

Sort your Flickr photos by shot date.

Keep dynamic IP information up to date on OpenDNS website.

Manage documents and catalog them by type and date.

Sorting your images and photos by color, date taken, name, or size.

InterCal is a date conversion program and perpetual calendar

Up-to-date virus signatures and other information for Virex 6.2.

Set iCal icon/dock icon to show the current date in colors.