9: Pop-up Excel Calendar
Pop-up Excel Calendar lets you insert and configure a datepicker control without writing code. Simply click the Pop-up Calendar tab, which is added to the Ribbon, insert the calendar, check a few settings, and you're done. It's hard to find something any simpler than this one.
Susan Sales Harkins is an IT consultant, specializing in desktop solutions. Previously, she was editor in chief for The Cobb Group, the world's largest publisher of technical journals.