Helma is a server-side Javascript environment and web application framework

Helma is a server-side Javascript environment and web application framework for fast and efficient scripting and serving of your websites and Internet applications.

Helma is written in Java and employs Javascript for its server-side scripting environment, removing the need for compilation cycles and reducing development costs while giving you instant access to leverage the whole wealth of Java libraries out there.
(Link: Helma is a server-side Javascript environment and web application framework)