Keystone is a lightweight multi-platform, multi-architecture assembler
framework.

Highlight features:

- Multi-architecture, with support for Arm, Arm64 (AArch64/Armv8),
  Ethereum Virtual Machine, Hexagon, Mips, PowerPC, Sparc, SystemZ, & X86
  (include 16/32/64bit).
- Clean/simple/lightweight/intuitive architecture-neutral API.
- Thread-safe by design
- Implemented in C/C++ languages, with bindings for Python

WWW: https://www.keystone-engine.org/