Diodon is a GTK+ clipboard manager, aims to be the best integrated clipboard manager for the Gnome/Unity desktop.

With Diodon, you can access clipboard history with application indicator or unity dash. Especially, with a hotkey you can quickly access clipboard history and automatically paste selected item.

Install Diodon

Ubuntu 10.04 Lucid and higher can add Diodon Daily PPA and install Diodon with these commands in terminal window:

sudo add-apt-repository ppa:diodon-team/daily
sudo apt-get update
sudo apt-get install diodon diodon-plugins