Gedit is the text editor of default of Gnome and, besides its very characteristic notes of typical lightness and usabilità of the gnomo, introduce a system of plugin personalizzabile, highly similar to that one of firefox, than of it increases in important measure much the potentialities. Some of these plugin are installed of default, others can be implemented son a simple one sudo apt-get install gedit-plugins. Now enough to make Applicazioni->Accessori->Editor of text, to go on Modifica->Preferenze and to select the card plugin:

Others can some be found to questoindirizzo.