OFD.NET is a project to create an Open Flash Debugger in C#, plus other tools targeting flash technology and especially actionScript. There are plans for a swf parser/generator, an AS3 compiler, a decompiler, etc.
IDC is an interactive decompiler, where the user starts with an almost literal translation of Assembly code in C language, which he progressively decompiles by the successive application of low-level refactorings, ultimately leading to high-level C code.
Java Decompiler, Disassembler and Bytecode debugger. Decompiler supports Java 5 (e.g. generics, for-each loops etc). Debugger allows user to step through each bytecode and view program state. Contains Swing GUI.
Decompyle is a python disassembler and decompiler which converts Python byte-code (.pyc or .pyo) back into equivalent Python source. Verification of the produced code (re-compiled) is avaliable as well.
JReversePro is a Java Decompiler / Disassembler written in Java. Facility to view the ConstantPool contents is available. AWT, Swing and command-line versions are present.
MEDDAC is the seeding point for designing a new approach to Operating System design itself. It is an Open Source project with roots in mainframe design and development the author began in 1979. Monitor Editor Disassembler Decompiler Assembler Compiler
net-unwind is an open-source .NET decompiler for GNU/Linux based systems. It can decompile any .NET from Intermediate Language (based on CLR) back to similar or identical source code to the original in C#. A Qt GUI is provided for easy navigation.
A collection of ACS tools. It will have an ACS disassembler, because I intend to get a method of decompiling as quickly as possible. After that, there will be: compiler, decompiler, linker and translator, etc...
Java decompiler written in C++ aimed to decompile Java 6.0 (and below) class files. The intention of the decompiler is to generate source files using as much information provided in the class file as possible.