#Dropbox - #Password strength is indicated by colored bars underneath the input field
dropbox/zxcvbn-ios: A realistic password strength estimator.
Password-Strength is a jQuery based password strength checker and indicator that helps users meet your minimum password requirements.
GoCardless Password Strength-O-Meter by Petty
Is your password secure?
Beanstalk - The password strength indicator shows you the amount...
Beanstalk - The password strength indicator shows you the amount of hours needed to crack it.
xkcd: Password Strength
Password strength verification with jQuery
Strong Passwords, Strong Password Tips & Password Strength Checker | How...