KeyLemon provides additional security during the log-in process via a computer's webcam.

"Instead of typing your password, KeyLemon 2.2 associates your face with your profile, and then regularly checks to make sure that the person sitting in front of the computer matches the image attached to that profile," writes Download.com's Seth Rosenblatt. "If it doesn't think they match, the computer takes a photo via the webcam and then automatically goes to hibernate."

"A one-year license retails for $19.95, and it's compatible with XP, Vista, and Windows 7," Rosenblatt writes.

Click here to read the Download.com article.