Efficient Sticky Notes is a free program that will let you “Stick” your notes on the desktop, to read important information any time on the screen.
Efficient Sticky Notes allows various background colors, with optional gradient effect. You can also customize the font of each note, and set it to be semi-transparent.
To fully protect your privacy, the software encrypts the login password and also encrypts the data files.
Features: managing sticky notes by group, setting note importance, tracking the creation time and last modification time of notes, adding attachments to notes, delete to Recycle Bin, and more.
A pro, commercial, version is also available.