A Java Virtual Machine for OpenJDK
A reverse engineering suite (decompiler, editor, debugger and more)
Manifold is a Java compiler plugin, features include Metaprogramming
Learn Java the easy way!
XSharp Repository for the Compiler source code
Best IDE for Beginners
Translate java source into another language
An object oriented language for concurrent software development
A Java Decompiler with a catchy name.
A Java class viewer and decompiler which respect line numbers.