Jad - The fast Java decompiler. Separate versions for Win32, OS/2, most Unixen. Large choice of command-line and GUI front-ends available. [Free for non-commercial]Java Code Engineering - Marc Meurrens' page on engineering & reverse engineering Java class files. Review of books and on line resources on: the Java Virtual Marchine (JVM); code engineering & reverse engineering; class browsers, viewers & editors; assemblers; compilers; disassemblers & decompilers; obfuscators & unobfuscators. Comprehensive, well organized site.
JReveal.Org - Online decompiler and obfuscator. Also has a resource directory. [Freeware]
NMI's Java Code Viewer - The "user-friendly, visual" Java decompiler and disassembler for Win32 platform. [Shareware]
CafeBabe - Graphical disassembler and editor of Java bytecodes. Part of the JFA. [Open Source]
RIIS: Decompiling Java - Godfrey Nolan's book on writing your own Java decompiler may never be published, so early chapters are online in PDF format.
Java Optimize and Decompile Environment (JODE) - Java decompiler with full source code. Supports inner/anonymous classes. Also contains a small, but extensible bytecode obfuscator/optimizer. [Open Source, GPL]
JAscii - Converts binary java class files back into java source files. Supports inner classes, Java 2. [Commercial]
ClassCracker - Visual Java decompiler from Mayon Software Research. [Commercial]
Decafe Pro - Java Decompiler for Win32 platform. [Commercial]
dis - A functional, fast and simple disassembler that is written in C. Like javap, produces bytecode. Download Solaris, Win95/NT versions. Mac or other Unixen or source code by email request. [Freeware]
SourceTec Java decompiler - Patch to Mocha which defeats Crema. [Shareware]
SourceAgain - Java Decompiler for Win95/NT, Unix, web-based trial version from Ahpah Software. [Commercial]
Mocha - Hanpeter van Vliet's first Java Decompiler. Orphaned at Java 1.02, so crashes on inner classes. [Freeware]
WingDis 2.15 - Command line Java decompiler. [Commercial]
ClassSpy - GUI class analyser and decompiler. Also provides a simple obfuscator. [Freeware]
JReversePro - Decompiler/disassembler written entirely in Java. Provides facility to inspect constant pool contents. [Open Source, GPL]
