Activator

Activator is one of the best apps for jailbreaked iphones. You can use it to launch any of your apps using one of the gestures available on Activator: 

Home Button

Sleep Button

Status Bar – double tap, short hold

Motion – shake Slide in Gesture (from the bottom of the screen) – bottom-left, bottom, bottom-rightVolume Buttons – display tap, down and then up, up and then down

The system actions available within Activator are:

Home button press
Power down
Reboot
Respring
Safe Mode
Sleep Button
Spotlight