WidgetLocker Lockscreen allows you to fully control the look, feel and layout of your lock screen. You can add sliders, widgets and application shortcuts.
Embed your twitter, facebook, news, weather, sports- your favourite web services, right onto your lock screen. Through FlyScreen you can download through a lot more widgets and place them on your lock screen.
With LockMenu you can configure up to 9 sliders and make them launch applications, direct dial phone numbers, send text messages and configure the date, time and screen layout. It has a free version with advertisements and a paid one without any ads.
Locksreen Calendar does what it says. You can see your upcoming calendar events directly on the lockscreen! However this doesn't work with Samsung Galaxy S/S2 and HTC Sense.
If you are tired of having to unlock your phone each time you want to use it this app is for you. Run it just once and now each time you wake up your phone it will be ready for use.
Are you using any modifications or widgets on your lock screen? Personally I am not using an application like those!