While many of you may like previously mentioned Yakuake or similar drop-down Terminal apps, Nautilus Terminal takes a different approach: adding a Terminal pane to Nautlius for quick access.
Often, especially for command line newbies, opening a Terminal window still necessitates opening up Nautilus to check file paths and see other such system organisations graphically. If you find that you often open both simultaneously, Nautilus Terminal will get rid of a step by adding a full-featured terminal window as a separate, very customizable pane below Nautilus’ main toolbar. To get it on Ubuntu, just open a Terminal window (for the last time!) and type:
sudo add-apt-repository ppa:flozz/flozz
sudo apt-get update && sudo apt-get install nautilus-terminal
This will add the correct repository and install the program. Then, just log out and back in (or restart Nautilus) and enjoy your more streamlined file managing experience.
Nautlius Terminal is a free download for Gnome-based Linux systems.
Of course for KDE users, dolphin already has this built in. The hot key is F4