Unicorn is a lightweight, multi-platform, multi-architecture CPU emulator framework based on QEMU.

Unicorn offers some unparalleled features:

Multi-architecture: ARM, ARM64 (ARMv8), M68K, MIPS, SPARC, and X86 (16, 32, 64-bit)
Clean/simple/lightweight/intuitive architecture-neutral API
Implemented in pure C language, with bindings for Crystal, Clojure, Visual Basic, Perl, Rust, Ruby, Python, Java, .NET, Go, Delphi/Free Pascal, Haskell, Pharo, and Lua.
Native support for Windows & *nix (with Mac OSX, Linux, *BSD & Solaris confirmed)
High performance via Just-In-Time compilation
Support for fine-grained instrumentation at various levels
Thread-safety by design
Distributed under free software license GPLv2