Lock Screen 2 For OS X, iOS Lockscreen on the Mac
Lock Screen 2 completely changes the way users lock and unlock their OS X-powered desktop or notebook. It comes with a variety of options which let you decide how you want to lock/unlock your machine.
From Mac App Store:
Introducing The New Way To Lock/Unlock Your Computer Screen On MacOS
✔ Lock by hotkeys
✔ Lock after idle
✔ Lock before sleep
✔ Slide to unlock by keyboard
✔ Slide to unlock by trackpad
✔ Slide to unlock by passpattern
✔ Custom slide to unlock text
✔ Custom lock/unlock sound
✔ Custom wallpapers
✔ Open at login option
There are three ways folks can lock their Mac using Lock Screen 2: by using a specific combination of keyboard characters (hotkeys), auto-lock after the computer is left idle for some time and/or auto-lock before the computer goes to sleep mode.
Unlocking options are equally versatile, allowing users to slide to unlock (just like iOS) by pressing a row of characters on the keyboard or by pressing a specific row of characters on the keyboard (pass pattern) or by swiping across the trackpad like a boss.
Besides this, users can customize the lock/unlock sound, the lockscreen wallpaper and the slide to unlock text.
The app is compatible with OS X 10.6 Snow Leopard and 10.7 Lion.
This app is on sale for just $1.99