A password strength meter using zxcvbn and Bootstrap.
Hooks the password strength library zxcvbn up to a Boostrap progress bar, packaged in a JQuery plugin.
$("#StrengthProgressBar").zxcvbnProgressBar({ passwordInput: "#Password" });
Source code available on GitHub
"Good passwords are hard to guess. Use uncommon words or inside jokes, non-standard uPPercasing, creative spelllling, and non-obvious numbers and symbols"
zxcvbn is a password strength library developed by Dropbox, read more about it on their tech blog:
https://tech.dropbox.com/2012/04/zxcvbn-realistic-password-strength-estimation/
And of course, the xkcd comic: