These are different app for computers that will help you concentrate on your work rather than being on sites that you shouldn't be. Currently I am using the StayFocused chrome extension to block certain sites when I am working.
Todays Google Doodle found on the google homepage is dedicated to Shakuntala Devi. She is also known as the "Human Computer" I have attached the wikipedia article that details who Shakuntala Devi is and why she is important enough to receive the doodle! :)