The screenshot made me think that this was an app to create system-wide ”hovering notes”, of the kind that appears when you hold your cursor (unclicked!) a couple of seconds above certain spots (like the buttons in Firefox, or the Start button in Windows). I'd love to be able to create a reminder note that appeared each time my cursor hovered above the HD icon…
But no. This program is just another ”Stickies” program. And the BAD thing is that the ”Sheets” (= stickies with one pointing corner) just vanish when you quit the main window. Even when you keep the program running in the background, close a sheet and reopen it, the program seems to have trouble to remember the original position of your reopened sheet. This program adds no functionality that you can't get with Apple's stickies or alternatives such as ”SideNote”. Don't waste your time.