USB Raptor - Lock and unlock your computer using USB flash drives as keys.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Near Lock - A new way to lock your Mac. Just walk away.
andOTP - andOTP is a two-factor authentication App for Android 4.4+
MacID - Unlock your Mac with just your fingerprint, passcode, or wrist – without even unlocking your iOS...
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.