PE Explorer is the most feature-packed tool for rapid reverse engineering and understanding the inner workings of PE files (EXE, DLL, ActiveX controls, and several other Windows executable formats). It comes with a PE File Viewer, Disassembler, Exported/Imported API Function Viewer, API Function Syntax Lookup, Resource Editor and a Dependency Scanner. Once inside, file structure and design can be analyzed, problems diagnosed, changes made and resources rebuilt and repaired. It tells you just about every little detail you could possibly want to know about a PE file, and provides insights into how a program works. On top of all that, PE Explorer has UPX and Upack Unpackers built in.

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