Pastie is a small clipboard manager that uses an indicator-applet to display and give access to your clipboard history.
It boasts a modest set of configurable preferences including history size, options to set keyboard shortcuts and minor interface tweaks to the applet itself.
It has its own PPA
sudo add-apt-repository ppa:hel-sheep/pastie
sudo apt-get update && sudo apt-get install pastie
By default Pastie uses a stock GNOME icon for its indicator. FOr users of Ambiance or Radiance this looks less than ideal but is easily remedied by replacing the stock icon with mono-style equivalents created by DeviantArt user ~Ramzea.
Download, extract and pop your required icon in