Two Factor Auth (2FA) - List of websites and whether or not they support 2FA

Rename Email - Easily change the subject of any email, by cloudHQ

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.

WhoApp - Know who's calling before you answer

Rapid 2FA - A painless way to add two-factor authentication to your site

Hydro Mobile App - Free, instant, scalable, blockchain-based 2FA security