The Open On-Chip Debugger
An assembler for the legendary 6502 processor and it's derivatives
This is a port of the ebe programming environment to QT.
Blazing fast and correct x86/x64 disassembler, assembler, decoder, etc
RetDec is a retargetable machine-code decompiler based on LLVM
A machine code manipulation library for Intel 64 and IA-32.
Japheth's assembler, JWasm
powerpc disassembler/assembler