Space is a premium with small desks, and so any tool that allows you to gain more space is handy.

This small organizer allows you to keep pens and small knickknacks off your desk and into the little holder.  For small things, this works great, though I wish the organizer was square instead of round.  Given its shape and size, lots of things don't fit on the desktop round.  A rectangle would have been far more practical.

Also make sure you watch for the thickness of the desk.  It will fit a standard desk but not anything that is much thicker.  I have a glass standing desk and it's too thick for that.