Cactusus is a program developed as a replacement for "sticky notes" on your desktop. Just text taking very little space and always staying on top. Notes can be dragged by mouse to desired place. For each note your can define comments and a "see also" remark. Comments are displayed in a tooltip of the note. "See also" remark may contain anything that Windows can understand and launch: doc file, web link etc. To access a note context menu drag mouse over note text and when mouse pointer turns to "hand" - right-click.