Finagle - Finagle is a protocol-agnostic RPC system.
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.
Akka - Build powerful reactive, concurrent, and distributed applications in Java and Scala
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
Dapr - Application and Data, Build, Test, Deploy, and Microservices Tools
Better Uptime - We call you when your website goes down