AWS CodeDeploy - AWS CodeDeploy is a service that automates code deployments to any instance.
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.
Jenkins - Jenkins is an open-source continuous integration server with 300+ plugins to support all kinds of software development
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Google App Engine - A powerful platform to build web and mobile apps that scale automatically.
Better Uptime - We call you when your website goes down