StickIt 3.0.6

StickIt is a Windows desktop sticky note application. Create notes and place them anywhere on your desktop. The notes will stay where you leave them until they have been closed. The notes will even reappear after rebooting your computer. You can customize your notes by choosing from a wide range of text and background colors.

If you're on the same network as other StickIt users, you can create notes on their desktops. You can send notes across other networks as well, but that requires that both StickIt users have properly opened port 1978 for UDP access.