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USB Lock (formerly USB Screen Lock)
Easily lock or unlock your screen by using a USB device....
Lock It!
Lock It! - Just double click the lock to secure your computer...
Lock The Text
A Firefox add-on that helps you encrypt your text data in browser before you submit it to a network...
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Zoom Lock
Google Chrome extension that zooms the current web page and looks the zoom rate...
Lock/Unlock
Lock/Unlock - Contextual Menu Item to lock or unlock a file...
Utility Lock
Utility Lock - a custom built Screen Locking mechanism...
Lock Tab
A Google Chrome extension that provides you the ability to lock a page while browsing...