Guake is a new kind of terminal emulator, where instead of a new window, youu can open a drop down screen to get a terminal. The screen can be dropped down using a single key press and its really helpful if you need a distraction free desktop with command line tasks running in the background without bothering you. The recent update contains the following changes:

• New icons for both guake and guake-prefs
• Add option to start in fullscreen mode
• Fixed terminal scrolls to the wrong position when hiding and unhiding in fullscreen mode
• Fixed toggle fullscreen malfunction
• Fixed Guake overlapped the second screen in a dual-monitor setup with a side-panel
• Many other fixes

You can install the latest version in your Ubuntu based distro by adding a PPA:

sudo add-apt-repository ppa:niteshgupta16/ubuntuvibes
sudo apt-get update
sudo apt-get install guake