HandyList for Mac

From Expersis Software:

HandyList is a control strip module used to display and edit a simple text list of items. Use it to store frequently used contact names, phone numbers, email addresses, notes, to-do items or any other text information. To access the list, simply click on the control strip module. A menu pops up that shows the items in a sorted list. New items can be added, and existing items can be edited or removed from the popup menu itself.