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.
Softaken Office 365 Backup - Softaken Office 365 Backup to export Office 365 files to PC
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
SysTools Office 365 Backup - Instantly backup your Office 365 Mailbox to PST / EML format with SysTools Office 365 Backup & Restore software for MAC and Win.
Better Uptime - We call you when your website goes down
MailsDaddy Office 365 Backup Tool - Office 365 Backup Tool to export PST from Office 365. Export Office 365 mailbox to PST securely and effortlessly.