Terminator
Terminator is a terminal emulator with a lot of useful feature (first of all the ability to manage more than one shell in the same window).
Shortcuts
The more useful shortcuts are the following:
Ctrl-shift-E: vertical split
Ctrl-Shift-O: horizontal split
Ctrl-Shift-P: go on the previous view.
Ctrl-Shift-N: go on the next view
Ctrl-Shift-W: close current view
Ctrl-Shift-Q: exit terminator.
Ctrl-Shift-X: enlarge current window
Installation
To install terminator type in a shell:
sudo apt-get install terminator