Lock Screen imitates an iOS protection function and introduces a new way to lock and unlock your Mac’s screen.

Features

Instant Lock – No matter what application you’re using, you can simply press Command+L button to lock your screen instantly.
Slide to Unlock – Just slide your finger on keyboard to unlock. Don’t waste your time to type a long password and click enter.
Passpattern – The next generation of password is here. Passpattern give you an easy and secure way to lock the screen.
Beautiful Lock Screen UI – Various settings

Custom Backgrounds, Automatic Sleep, Lock On Startup, Lock When Launch etc.
What’s New
Version 2.0.2:

Fixed incorrect lock screen display size when in ultra-high resolution on Lion.
Add 15, 45 minutes auto lock option.
Enable unlock by trackpad by default.

Requirements

Mac OS X 10.6 or later