Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Two Factor Auth (2FA) - List of websites and whether or not they support 2FA
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
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.
Better Uptime - We call you when your website goes down
TypingDNA Authenticator - 2FA codes in your browser, secured by the way you type