Apache Tomcat is a web server written in 100% Pure Java.

Apache Tomcat 11.0.x is the current focus of development. It builds on
Tomcat 10.1.x and implements the Servlet 6.1, JSP 4.0, EL 6.0, WebSocket TDB
and Authentication TDB specifications.
This release is a milestone release and is targeted at Jakarta EE 11.