Widgetlocker : Costumize your own lockscreen

Discription: WidgetLocker is a highly customizable lock screen replacement that lets you place widgets, application shortcuts, and custom sliders on your lock screen.

Custom Sliders
Setup shortcuts in your own custom sliders. Any app or system shortcut can be placed on a slider. Never miss a photo again with slide-for-camera.

User Themes
WidgetLocker's user theming system allows the community to create their own slider themes. The themes are a simple format, images in a zip file, encouraging artists, not just developers, to create and share their masterpieces. Check out the collection over at XDA Developers.

Widgets

Widgets are one of the best things about Android. And WidgetLocker brings those to the screen you see everytime you wake up your phone. You can use standard Android widgets with WidgetLocker, such as Beautiful Widgets or the scrollable Pure Messenger Widget. There's also Widgets that are especially tuned for the lock screen, such as Phantom Music Control, Missed It!, OwnerInfo Widget or ICE by Serra-Apps

Control

WidgetLocker gives you control. Every user uses their phone differently and the lock screen should respect that. Some popular settings are:
- Easy Wake Mode - Allow hardware buttons (Such as the volume keys) to wake the device
- Allow volume buttons at the lock screen - either just for music or for ringer and music
- Expand notification bar while locked
- Custom screen lock/unlock sounds
- Block popups from other apps
- Tasker integration (Check the 3rd party tab in Tasker)

Screenshots: 

Link: Widgetlocker