MiTeC EXE Explorer (EXE Explorer for short) is a small, single-portable and free EXE/PE file resource explorer and extractor. It allows user to get very detailed information about all executable files. For example, you can view sections and directories, classes and packages, version information, and so on. And you can export all the information in text format.

PEiD (short for PE iDentifier) is a well-known professional packer/cryptor/compiler detecting tool. It's so powerful that it can detect the types/signatures of almost any PE file packing tools (at present, the number has been more than 600 kinds). In addition to the official version, AppNee also provides you its full-plugin version, which can be treated as the most perfect one version (contains 60+ plugins and necessary runtime library files: mfc70.dll, msvcr70.dll, rtl70.bpl, vcl70.bpl) on the Internet at present. I do believe reverse engineers or software cracking/unpacking enthusiasts must like it very much.

UPX (Ultimate Packer for eXecutables) is a very comprehensive executable file compressor/decompressor that only supports DOS/command-line. It supports executable files on almost any sorts of platforms (EXE, DLL, OCX, BPL, CPL, etc.), comes with excellent compression ratio.

MultiExtractor is a practical, powerful and pretty handy multimedia resource (graphic file, audio file, video file, etc.) extractor from Poland. It supports all kinds of executable files (DLL, EXE, SlideShow...), PDF, Office document, binary file...

eXeScope is a lightweight but extremely powerful resource editor, with which you can easily and directly modify resources (such as: fonts, menus, dialog boxes, strings, images, etc.) in EXE, DLL, OCX and other executable files.