Two Factor Auth (2FA) - List of websites and whether or not they support 2FA
X (Twitter) - Connect with your friends and other fascinating people. Get in-the-moment updates on the things that interest you. And watch events unfold, in real time, from every angle.
Authentiq - Strong authentication, without the passwords
Rapid 2FA - A painless way to add two-factor authentication to your site
Descript - Text-based audio editor and automated transcription
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type