Third-party TI-84 Plus CE / TI-83 Premium CE emulator
Blazing fast and correct x86/x64 disassembler, assembler, decoder, etc
An educational software system of a tiny self-compiling C compiler
RetDec is a retargetable machine-code decompiler based on LLVM
An open source interactive disassembler
A disassembler and a simulator for the MSP430 CPU