VBLock

Use an elegant, simple, and secure lock screen with more features than Windows’s built-in lock screen. .

Free Windows

Knock Lock

Knock Lock is simple application that allows you to select area on your display to enable "knock to sleep" feature. Also in app you can select size of area...

Freemium Android

xtrlock

Minimal X display lock program Just lock the keyboard entrance/mouse clicking until you type the password followed by [ENTER]

Free Mac OS X Linux BSD

Transparent Screen

Convert your smartphone launcher into transparent with free transparent screen app – AppsBazaar.

Free Android

Transparent Screen Lock

Transparent Screen Lock enables IT professionals to prevent unauthorized system access, while maintaining the ability to view applications running on the desktop for...

Commercial Windows