For the record, Google Authenticator has always been open source and is based on open HOTP and TOTP standards. You could always add arbitrary accounts to the mo

For the record, Google Authenticator has always been open source and is based on open HOTP and TOTP standards. You could always add arbitrary accounts to the mobile app using the key URI format: https://code.google.com/p/google-authenticator/wiki/KeyUriFormat https://code.google.com/p/google-authenticator/wiki/KeyUriFo... For example, here's a debug tool written in Javascript that has been online since early 2011: https://google-authenticator.googlecode.com/git/libpam/totp.html https://google-authenticator.googlecode.com/git/libpam/totp....