Stickies is an application for Apple Macintosh computers that puts Post-it note-like windows on the screen for the user to write short reminders, notes and other clippings.

[citation needed] In 1994, the first version of Stickies was written by Apple employee Jens Alfke and included in System 7.5.

[3] During the transition to Mac OS X in 2001, Stickies was rewritten in Cocoa, and is still included in macOS, with features such as transparent notes, styled text, lists, and the ability to hold pictures.

The ability to collapse note windows, which is present in all versions of Stickies, is a holdover from System 7.5's WindowShade feature.

In macOS Big Sur, the icon has been changed to look like a stack of sticky notes in a rounded square design.