Activator is that application that lets you set a lot of stock gestures. It is an application used by many others that are in Cydia, SBSettings including himself from almost the beginning of its existence.

They just updated with interesting news:

• Added option to press 3 times the Home button for an action
• Added option to show the volume bar in a gesture
• Fix missing icons in IOS 5 (hopefully Blank icons as well)
• Improved scrolling in Settings
• Added message from Safe Mode
• Improved memory consumption
• Added a toggle for the notification center
• Improved behavior of the shift in the iPhone
• Fixed problem with double tap on the lock screen

You can download it for free on Cydia.

The'll find BigBoss repo.

You need to have done the jailbreak.