Execwar is a project mainly written in RUBY and JAVA, it's free.
Executable war file created with jruby, runnable with 'java -jar execwar.war'
This is a sample rails app testing executable, non-exploded wars with JRuby.
Setup: jruby -S gem install geminstaller jruby -S geminstaller
Build: jruby -S rake uberwar:build
Run: java -jar execwar.war
Copyright (c) 2010 Pivotal Labs. This software is licensed under the MIT License.