You've no doubt seen many date pickers that let you select a date for a textbox to submit into a form.  But what about a simple way to select a range of dates using a predefined range name, like "last week":

I was in need of a dropdown menu to choose date ranges for reports, and wanted something that would match the existing dropdown and button styles of Bootstrap: thus came about this date range picker component. Download it at GitHub.

From Dan Grossman | A date range picker for Twitter Bootstrap.

I can think of a few projects of mine that would benefit from such a control.