Capstone disassembly/disassembler framework
Export disassemblies into Protocol Buffers
RetDec is a retargetable machine-code decompiler based on LLVM
Emulator of the ancient 8 bit microprocessor SC/MP 2
An assembler and disassembler for the JVM (Java Virtual Machine)
Java classfile assembler/disassembler and interactive low-level editor