Each Note in EssentialPIM could be stuck to your desktop as a nice colored note. To make a note sticky use Sticky option from note's context menu:

Sticky notes default options could be found at Tools -> Options -> Sticky Notes:

You can set default size and color for newly created notes.

Each sticky note has it's own tool panel:

It can set note to:

Stay on Top - note will be displayed in the top of all windows.

Roll up/down - rolls note up and down

Edit in EPIM - opens note in EssentialPIM

Delete - puts note to Trash

Hide - disables Sticky option

Displaying options such us Color and Transparency could be set in Settings menu: