i3wm

Basics
+  	open new terminal
+ j 	focus left
+ k 	focus down
+ l 	focus up
+ ; 	focus right
+ a 	focus parent
+  	toggle focus mode

Moving windows
+  + j 	move window left
+  + k 	move window down
+  + l 	move window up
+  + ; 	move window right
Modifying windows
+ f 	toggle fullscreen
+ v 	split a window vertically
+ h 	split a window horizontally
+ r 	resize mode

Look at the “Resizing containers / windows” section of the user guide.
Changing the container layout
+ e 	default
+ s 	stacking
+ w 	tabbed
Floating
+  +  	toggle floating
+  	drag floating
Using workspaces
+ 0-9 	switch to another workspace
+  + 0-9 	move a window to another workspace
Opening applications / Closing windows
+ d 	open application launcher (dmenu)
+  + q 	kill a window
Restart / Exit
+  + c 	reload the configuration file
+  + r 	restart i3 inplace
+  + e 	exit i3