JZipper
Obfuscates and packages required Java class files. [Commercial]
Katirya
Encrypts Java class files and create and executable file. At run time, Katirya decrypts class files and delivers valid Java byte-code to class loader to load the class. Req. registration for download. [Shareware]
Marvin
Removes unnecessary classes and obfuscates applications, applets, and servlets. Supports encryption of string constants. [Freeware]
ProGuard
Shrinks and obfuscates, with template-based configuration. Comes with an Ant task, a J2ME WTK plugin, and a tool to de-obfuscate stack traces. [Open source, GPL]
RetroGuard
Highly-configurable Java bytecode obfuscator with support for Java 2, reflection and scripting. [Open Source, LGPL]
Saffeine
Tool for the Java bytecode protection and feature driven license management. The 'Saffeine' engine uses strong cryptography algorithms to obfuscate unlicensed Java byte code. [Commercial]
Semantic Designs Java Obfuscator
Scrambles source code using nonsense names and stripping comments to disable reverse engineering. Works on large sets of files. [Commercial]
Smokescreen
A Java class file obfuscator, that supports selective renaming, unused method and field removal, as well as bytecode obfuscation. [Shareware]
yGuard
Bytecode obfuscator configurable to run through Ant build scripts. [Freeware, core library is open source, LGPL]
Zelix KlassMaster
Java obfuscator with flow obfuscation, string literal encryption, scripting, Ant integration, incremental obfuscation, obfuscated line numbers, J2ME plugin and stack trace translation. Also removes unused classes, fields and methods. [Commercial]
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