Software Post-it Notes are just as useful as their paper equivalents, and even better, they are free and never run out.

This free version allows you to create notes on the desktop that can be set to stay on top of other windows to make an effective reminder. They can also contain pictures and weblinks to help jog memories. An alarm can be set to accompany each note and it can be repeated on a daily or weekly basis if required.

A small Post-it window is always visible and a single click creates a new note. The formatting of the notes can be changed including the font and the colour of the note.

There are two more advanced versions available from 3m with more features but at US$15 and US$25.