PE Explorer 

PE Explorer makes it easy to view, analyze and edit win32 executable files (EXE, DLL, SYS, ActiveX). Offers easy-to-use tools such as a Visual Resource Editor, powerful Win32 Disassembler, DLL Export Viewer, UPX Unpacker and Dependency Scanner.
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CheckPRC 

CheckPRC is a useful tool for Palm developers to determine the earliest version of Palm OS that a Palm application may run on, and to identify all the Palm OS functions that the application uses.
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JCavaj Java Decompiler 

JCavaj Java Decompiler is a free Java-based Java Decompiler. It reconstructs the original source code from a compiled binary class file. You can decompile java applets, jar and zip files producing accurate java source code.
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Cavaj Java Decompiler 

Cavaj Java Decompiler is a graphical freeware utility that reconstructs java source code from CLASS files. You can decompile java applets, jar and zip files producing accurate java source code.
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