Apache Tomcat 9
Apache Tomcat 9 implements Servlet 4.0 and JavaServer Pages 2.3.
Apache Tomcat 9 - Documentation Index
Apache Tomcat version 9.0 implements the Servlet 4.0 and JavaServer Pages 2.3 specifications from the Java Community Process, and includes many additional features that make it a useful platform for developing and deploying web applications and web services.
Java Servlet 4.0
JavaServer Pages 2.3