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.
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type
Rapid 2FA - A painless way to add two-factor authentication to your site
Cotter - One-click phone number login and checkout
Hydro Mobile App - Free, instant, scalable, blockchain-based 2FA security
Auth0 - Auth0 is a program for people to get authentication and authorization services for their own business use.