/Developer/Applications/Java Tools/Jar Bundler.app
Jar Bundler takes a collection of Java class files and other resources and packages them as a stand-alone Mac OS X application. This is useful for distributing pure Java programs to a wide audience of Mac OS X users.
JavaBrowser is a stand-alone class browser for Java objects. You can use JavaBrowser to summarize various Java interfaces available on Mac OS X. These include the standard Java distribution, Apple's Cocoa bindings for Java, and other interfaces.