Google Authenticator for multi-factor authentication

Here is a Python library implementing all of the OATH OTP-linked standards (HOTP, TOTP and the more obscure OCRA):

https://github.com/bdauvergne/python-oath

Then a little python-snippet to generate a TOTP generator (TOTP client) as a javascript bookmarklet:

https://github.com/bdauvergne/totp-js

If works as google-authenticator but in the browser. You can put the bookmarklet near the QRCode as simple <a/> link, and people can bookmark it. Just click on the bookmark and a message box open with your password. I think it only works with decent browsers (chrome&mozilla).