Apache Tomcat - An open source software implementation of the Java Servlet and JavaServer Pages technologies
Charles Proxy - HTTP proxy / HTTP monitor / Reverse Proxy
nginx - A high performance free open source web server powering busiest sites on the Internet.
Wireshark - Wireshark is a network protocol analyzer for Unix and Windows. It lets you capture and interactively browse the traffic running on a computer network.
vCenter Server - IaaS platform for managing and deploying virtual machines
Postman - The Collaboration Platform for API Development