Ffi projects on GitHub

Foreign function interfaces for calling between languages, e.g. Python and Rust.

As of October 18, 2026, the most-starred Ffi projects on GitHub are pybind11 (18K stars), pyo3 (16.2K stars) and cython (10.9K stars). GitHub.Locker tracks 11 Ffi repositories with 61.5K stars combined. The fastest-growing on October 17 was spinel, with +11 stars in a day.

11Projects

61.5KStars in total

+31Stars in a day

Browse in the catalog →github.com/topics/ffi ↗

Hot right now

Most stars gained in a day · Oct 17

+11

spinel

matz/spinel · ★ 2.3K

Spinel is a Ruby ahead-of-time compiler that turns Ruby source code into standalone native executables by inferring types across the whole program and generating optimized C code.

tinyjsapp

tarwin/tinyjsapp · ★ 1.1K

tinyjs lets you build native desktop apps in plain JavaScript for both the backend and frontend, shipping as a tiny ~6MB app with no Electron, Node, or bundled Chromium — the backend runs on txiki.js and the frontend renders through the system's native WebKit.

pyo3

PyO3/pyo3 · ★ 16.2K

PyO3 is a Rust library of bindings to the Python interpreter: it lets you write native Python extension modules in Rust, or embed Python and run Python code from a Rust binary.

Roam-Control

seanhowarthdev/Roam-Control · ★ 1.1K

Roam Control is a SwiftUI iOS app that lets you choose, test and move your iPhone's reported GPS location for development, QA and responsible personal testing.

The all-time top

11 projects · by stars

#1 · pybind/pybind11
pybind11
pybind11 is a lightweight header-only C++ library that exposes C++ types in Python and vice versa — mainly to create Python bindings for existing C++ code.
18K
#2 · PyO3/pyo3
pyo3
PyO3 is a Rust library of bindings to the Python interpreter: it lets you write native Python extension modules in Rust, or embed Python and run Python code from a Rust binary.
16.2K
#3 · cython/cython
cython
Cython is an optimising compiler for Python: it translates your Python code into C/C++ and compiles it into fast native extension modules. It is the most widely used Python to C compiler.
10.9K

4
xquad
5.6KQuipNetwork/xquad · Python
XQuad is a hardware-agnostic toolchain for expressing and running quadratic optimization problems (QUBO / Ising / discrete) across quantum annealers and classical solvers, acting as a common intermediate representation you write once and retarget to any supported backend.
5
sdk-rust
4.3Kastrid-runtime/sdk-rust · Rust
This is the Rust SDK for building Astrid 'capsules' - sandboxed WASM modules that act as user-space processes in the Astrid OS model, with safe typed access to kernel services like filesystem, IPC, networking, storage, approval, and scheduling.
6
spinel
2.3Kmatz/spinel · C
Spinel is a Ruby ahead-of-time compiler that turns Ruby source code into standalone native executables by inferring types across the whole program and generating optimized C code.
7
Roam-Control
1.1Kseanhowarthdev/Roam-Control
Roam Control is a SwiftUI iOS app that lets you choose, test and move your iPhone's reported GPS location for development, QA and responsible personal testing.
8
tinyjsapp
1.1Ktarwin/tinyjsapp · C
tinyjs lets you build native desktop apps in plain JavaScript for both the backend and frontend, shipping as a tiny ~6MB app with no Electron, Node, or bundled Chromium — the backend runs on txiki.js and the frontend renders through the system's native WebKit.
9
PythonCall.jl
1.1KJuliaPy/PythonCall.jl · Julia
PythonCall.jl (with its Python-side counterpart JuliaCall) lets you call Python code from Julia and Julia code from Python through a symmetric interface, converting objects between the two languages.
10
goose
607aardappel/goose · C++
Goose is a memory-safe systems programming language with no heap allocator, garbage collector, or lifetime annotations. In its own benchmarks it runs faster than C++ and safe Rust while using less memory.
11
sghtmltopdf
346waka/sghtmltopdf · Rust
sghtmltopdf is a Rust-based HTML-to-PDF renderer, a 'second generation' successor to wkhtmltopdf and wicked_pdf, built without depending on Chromium, WebKit, or Gecko. It targets structured documents that flow top to bottom with explicit breaks, like invoices and reports, rather than arbitrary web pages.