Ripway.com doesn't work, so the lastest download link is:

Updated at 2007-12-06
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• Requirements:

1, Eclispe SDK 3.2.1

• Installation:

1, download the redistribution of jdt 3.2.1 made by uniera
2, close your eclipse(Note: it must be v3.2.1) if running
2, backup your org.eclipse.jdt.core_3.2.1.v_677_R32x.jar in folder $eclipse/plugins
3, replace it with this redistribution
4, start your eclipse

• Obfuscating:

1, Right click your Java Project, aka 'myproject', choose 'Properties'
2, Select the 'Java Compiler' tab page
3, Check the 'Enable project specific settings'
4, OK and return your project 'myproject'
5, Open the file 'myproject/.settings/org.eclipse.jdt.core.prefs' using any text editor
6, Append a new line: org.eclipse.jdt.core.compiler.obfuscator=true
7, Save and close it
8, Clean and rebuild the 'myproject'

• Uninstall

1, close your eclipse if running
2, restore the org.eclipse.jdt.core_3.2.1.v_677_R32x.jar you've backupped into folder $eclipse/plugins

• Note

1, The obfuscating only changes the code structures and does never change any name of classes, fields or methods. So it's safe to run in all dynamic contexts.
2, To obfuscate the names of classes, fields and/or methods, you can use any other tools, e.g. ProGuard.

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Here is an example.

An early binary package of ecmax is released now. Only the change summary feature is not finished yet.

The file list:

• ecmax_1.6a.chm: the API document.
  

• rhinox_1.6a.jar: full binary package.
  

• rhinox_1.6a_dom_jdk5.jar: special binary package only with DOM-based e4x impl (JVM 5.0 needed for running).
  

• rhinox_1.6a_stax.jar: special binary package only with StAX-based e4x impl.

• rhinox_1.6a_stax_jdk6.jar: special binary package only with StAX-based e4x impl (JVM 5.0 needed for running).

• rhinox_1.6a_xbean.jar: special binary package only with xbean-based e4x impl.

Features from Mozilla Rhino

• 'like' expr support.
• BigDecimal instead of double.
• Defered xml and joint xml.
• xml + number expr is redefined.
• xml.idx_from_1 expr for xml.
• xml.ns:name expr for xml.
• *change summary for xml.
• Some bug fixes.

Note: ecmax™ means the extensions for ECMA-262 and ECMA-357.