A very powerful, versatile, and customizable Win32 user mode debugger/disassembler. PEBrowse Interactive is not a source code debugger, but operates at the Intel x86 instruction level and therefore at the lowest level where your program executes. The debugger fully supports Microsoft .NET managed processes and seamlessly allows interop or mixed-mode debugging.

BIEW (Binary vIEW) is a free, portable, advanced file viewer with built-in editor for binary, hexadecimal and disassembler modes. It contains a highlight Java/AVR/PentiumIV/Athlon-64 disassembler, full preview of MZ, NE, PE, LE, LX, DOS.SYS, NLM, ELF, a.out, arch, coff32, PharLap, rdoff executable formats, a code guider, and lot of other features, making it invaluable for examining binary code.