Healthchecks.io - Monitor your cron jobs and scheduled tasks, get notified when they fail.
ManageEngine RecoveryManager Plus - RecoveryManager Plus is one such enterprise backup solution which has the ability to easily backup and restores both the domain controllers and virtual machines.
Pingbreak - Pingbreak is an original and free monitoring service.
SECDO - SECDO offers automated endpoint security and incident response solutions
DownDetector - A simple service to tell you whether a website is down.
Heroku Enterprise - Heroku Enterprise is a flexible IT management for developers that lets them build apps using their preferred languages and tools like Ruby, Java, Python and Node.