DashClock Contact Extension is an extension for DashClock Widget. It allows you to choose a contact to direct dial from the lock screen. It allows you to also send a sms, or view a contact with a quick touch on the widget. The view action can open either the QuickContact view or the full view configurable in preferences.
DashClock Contact Extension requires DashClock Widget by Roman Nurik: http://play.google.com/store/apps/details?id=net.nurik.roman.dashclock
There is also a pro version available which allows you to add up to 3 contacts to your lock screen.
READ CONTACT - read contact data, phone numbers, social network status, etc
DIRECT DIAL - Call the phone number