Jetty
From Oxxus Wiki
Jetty is a pure Java-based HTTP server and servlet container (Application server) developed as a free and open source project as part of the Eclipse Foundation.
Jetty provides web services in an embedded Java application and it is already a component of the Eclipse IDE. It supports Web Sockets, OSGi, JMX, JNDI, JASPI, AJP and other Java technologies
Jetty hosting is supported on all Virtual private servers (Linux VPS)
Documentation and guides