Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.
Microsoft IIS - Internet Information Services is a web server for Microsoft Windows
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
LiteSpeed Web Server - LiteSpeed Web Server (LSWS) is a high-performance Apache drop-in replacement.
RabbitMQ - RabbitMQ is an open source message broker software.