We are proud to announce the availability of yGuard 2.0.

http://www.yworks.com/products/yguard

yGuard is our free bytecode obfuscator that integrates perfectly with the Ant
build tool. It can be used to obfuscate jar files and text-resource files
accordingly in order to both make decompilation a lot more difficult and
decrease download file sizes of your applications.

Version 2.0 makes configuring the obfuscation process easier and uses
sophisticated bytecode analysis that allows it to remove unneeded fields,
methods, and classes.