i3 is a tiling window manager, completely written from scratch. The target platforms are GNU/Linux and BSD operating systems, our code is Free and Open Source Software (FOSS) under the BSD license. i3 is primarily targeted at advanced users and developers. Taken from http://i3wm.org
i3 is a really lightweight tiling window manager, it’s easy to configure and really usable if you are willing to learn the way of tiling wm.
How to install it on Ubuntu 14.04:
Open up your software center
Search for package name: i3
You'll see 2 packages, one containing metadata and one containing i3, install both.
After installation is done, log out and choose i3 on the Desktop Environment selection.
How to install it on Arch Linux:
sudo pacman -S i3-wm i3lock i3status dmenu
Now just edit file .xinitrc, remove the lane corresponding to your DE or WM and add
Log out and log in.
i3 first login will ask you for the key that you want as modifier key, ALT or WIN, select the key and press enter.
If you want to launch any program press ctr+d and an upper bar will appear, type the name of the program there.
If you want to be fullscreen on any given program on your desktop, press ctr+w;\
Moving between desktops alt+1 alt+2 …
Back to tiling ctr+e
Swap from horizontal to vertical tiling ctr+e
If you want to move current program to other desktop press ctr+shift+(desktop number) example: ctr+shift+1
Configuration file for i3 will be on ~/.i3/config
Ubuntu places i3 status bar configuration file on /etc/i3status.conf
Arch linux places it on ~/.i3statusconf