An open-source x64/x32 debugger for windows
A Hex Editor for Reverse Engineers, Programmers
Capstone disassembly/disassembler framework
RetDec is a retargetable machine-code decompiler based on LLVM
A machine code manipulation library for Intel 64 and IA-32.
Open-source disassembler for x86/x64 machine code (New BSD License!)