Quick Cycle and Recent Apps in Windows 8

Quick Cycle:

To quickly cycle between open apps:

Touch – Swipe inwards from the left edge of the screen.

Key/Mouse – Move the mouse pointer into the upper left-hand corner and click to cycle through each app.

You can also cycle through open apps with the keyboard shortcut: Alt + Tab

Quick Cycle in Windows 8

Show Recent Apps:

Recent apps helps every time and get you to the higher usability because you recently go to apps again and again by just tapping recent apps in windows 8 look at how to show a list of your recently used apps:
 
Touch – Swipe in and back out from the left edge of the screen.
 
Key/Mouse – Move the mouse pointer to the upper or lower left corners of the screen, then move the mouse along the left-hand edge of the screen towards the center. You can also use the 

keyboard shortcut: + Tab , Hold down the key and keep tapping the Tab key to cycle through
the list.