PagerDuty - Cloud based monitoring service
Apache HTTP Server - Apache httpd has been the most popular web server on the Internet since April 1996
OpsGenie - Alerting and On-Call Management for Dev&Ops Teams
Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Squadcast - Automate incident response, reduce downtime and enhance your tech teams’ delivery with a unified platform.
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.