Transparent Screen Lock - Password protect your workstation or server with "Transparent Screen Lock" while monitoring programs that are running.
Lockinfo - You can find this app in Cydia - Tweaks.
ClearLock - A transparent screen locker.
Dreamboard - DreamBoard lets you take control over the homescreen of your jailbroken iPhone.
BlueLife KeyFreeze - FREE Windows application that blocks your keyboard and mouse without “locking” the screen.
Springtomize - Tear down the walls