$mod
refers to the modifier key (alt by default)
startx i3
start i3 from command line$mod+<Enter>
open a terminal$mod+d
open dmenu (text based program launcher)$mod+r
resize mode ( or to leave resize mode)$mod+shift+e
exit i3$mod+shift+r
restart i3 in place$mod+shift+c
reload config file$mod+shift+q
kill window (does normal close if application supports it)
$mod+w
tabbed layout$mod+e
vertical and horizontal layout (switches to and between them)$mod+s
stacked layout$mod+f
fullscreen
$mod+shift+<direction key>
Move window in direction (depends on direction keys settings)
Window tiling mode is fantastic. 😃