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.

JVM Asset Pipeline library for serving static web assets, bundling, minifying, and extensibility for transpiling.

Common Servlet/JSP Functionality

Minify Script Maven Plugin