Export disassemblies into Protocol Buffers
Freeze (package) Python programs into stand-alone executables
Capstone disassembly/disassembler framework
Third-party TI-84 Plus CE / TI-83 Premium CE emulator
An assembler for the legendary 6502 processor and it's derivatives
Generic Code-Seeking Diassembler with Fuzzy-Function Analyzer
Assembles M6800 and 6801 assembly language source code. (and Forth)
Open-source disassembler for x86/x64 machine code (New BSD License!)
An assembler and disassembler for the JVM (Java Virtual Machine)
Japheth's assembler, JWasm
Java classfile assembler/disassembler and interactive low-level editor