StatusGator - Monitor all your hosted applications, vendors, and websites, and keep your team informed of outages. StatusGator is the world's premier status aggregator, status page, and website monitoring tool.
IsDown App - Monitor all your cloud services status pages in one place
Amazon CloudWatch - Amazon CloudWatch is a monitoring service for AWS cloud resources and the applications you run on AWS.
Feedsme - Feedsme is the business cloud services assistant that automatically integrates, analyzes and...
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Ctatus - CTATUS helps you monitor your external dependencies, catch problems before your clients, and get leverage over your competitors.