SoundLogin - two-factor authentication at the speed of sound..
SoundLogin is a technology which simplifies two-factor authentication process.
To use it install SoundLogin Authenticator app on your phone or tablet from Google Play or Apple AppStore and browser extension on your PC or Notebook (PC or Notebook should be equipped with microphone).
SoundLogin supports multiple services that offer two-factor authentication via time-based one-time passwords or SMS, such as Google, Microsoft, VK.com, Facebook, Amazon Web Services, WordPress.com, GitHub, Evernote and many other services.
Additional information can be found at SoundLogin official web-site