Closure Compiler is a JavaScript optimizing compiler. It parses your JavaScript, analyzes it, removes dead code and rewrites and minimizes what's left. It also checks syntax, variable references, and types, and warns about common JavaScript pitfalls. It is used in many of Google's JavaScript apps, including Gmail, Google Web Search, Google Maps, and Google Docs.

ZK Kernel

Minify Maven Plugin Maven Plugin

Apache Royale: Compiler: Compiler JX

JSCover is a tool that measures code coverage for JavaScript programs.

The Apache Royale Compiler Externs Compiler

Modern Web Application Architecture in Java

Wro4j Module

WicketStuff Closure Compiler Integration