Freely Sticky

Hott Notes is a "free sticky notes reminder program for your desktop. It´s simple, yet attractive interface makes it intuitive and easy to use. Not only can you post sticky note reminders, you can make checklists, set alarms, draw on your notes, and archive. Other features include a Notebook to organize your notes, a backup system to keep your notes safe, and much more." (OS: Windows 2000/XP/Vista/7)

What I thought was interesting about this freeware is the notebook option -- if you use sticky notes for organizing scenes, characters or what have you with your writing you could turn them into virtual versions with this program and keep them saved in the program's notebook (you can see the notebook window in the center of the screenshot up there.)