Here are some repos that use cibuildwheel.

Name	CI	OS	Notes
scikit-learn			The machine learning library. A complex but clean config using many of cibuildwheel's features to build a large project with Cython and C++ extensions.
Matplotlib			The venerable Matplotlib, a Python library with C++ portions
MyPy			MyPyC, the compiled component of MyPy.
psutil			Cross-platform lib for process and system monitoring in Python
scikit-image			Image processing library. Uses cibuildwheel to build and test a project that uses Cython with platform-native code.
twisted-iocpsupport			A submodule of Twisted that hooks into native C APIs using Cython.
websockets			Library for building WebSocket servers and clients. Mostly written in Python, with a small C 'speedups' extension module.
pyzmq			Python bindings for zeromq, the networking library. Uses Cython and CFFI.
aiortc			WebRTC and ORTC implementation for Python using asyncio.
River			🌊 Online machine learning in Python
coverage.py			The coverage tool for Python
numexpr			Fast numerical array expression evaluator for Python, NumPy, PyTables, pandas, bcolz and more
h5py			HDF5 for Python -- The h5py package is a Pythonic interface to the HDF5 binary data format.
Dependency Injector			Dependency injection framework for Python, uses Windows TravisCI
PyAV			Pythonic bindings for FFmpeg's libraries.
PyTables			A Python package to manage extremely large amounts of data
ruptures			Extensive Cython + NumPy pyproject.toml example.
aioquic			QUIC and HTTP/3 implementation in Python
pikepdf			A Python library for reading and writing PDF, powered by qpdf
DeepForest			An Efficient, Scalable and Optimized Python Framework for Deep Forest (2021.2.1)
google neuroglancer			WebGL-based viewer for volumetric data
AutoPy			Includes a Windows Travis build.
Parselmouth			A Python interface to the Praat software package, using pybind11, C++17 and CMake, with the core Praat static library built only once and shared between wheels.
python-rapidjson			Python wrapper around rapidjson
Rtree			Rtree: spatial index for Python GIS ¶
python-snappy			Python bindings for the snappy google library
markupsafe			Safely add untrusted strings to HTML/XML markup.
H3-py			Python bindings for H3, a hierarchical hexagonal geospatial indexing system
pybind11 cmake_example			Example pybind11 module built with a CMake-based build system
KDEpy			Kernel Density Estimation in Python
cyvcf2			cython + htslib == fast VCF and BCF processing
pybind11 python_example			Example pybind11 module built with a Python-based build system
sourmash			Quickly search, compare, and analyze genomic and metagenomic data sets.
dd-trace-py			Uses custom alternate arch emulation on GitHub
iminuit			Jupyter-friendly Python interface for C++ MINUIT2
time-machine			Time mocking library using only the CPython C API.
matrixprofile			A Python 3 library making time series data mining tasks, utilizing matrix profile algorithms, accessible to everyone.
CTranslate2			Includes libraries from the Intel oneAPI toolkit. The Linux wheels also include CUDA libraries for GPU execution.
jq.py			Python bindings for jq
Tokenizer			Fast and customizable text tokenization library with BPE and SentencePiece support
PyGLM			Fast OpenGL Mathematics (GLM) for Python
bx-python			A library that includes Cython extensions.
boost-histogram			Supports full range of wheels, including PyPy and alternate archs.
iDynTree			Uses manylinux_2_24
TgCrypto			Includes a Windows Travis build.
pybase64			Fast Base64 encoding/decoding in Python
etebase-py			Python bindings to a Rust library using setuptools-rust, and sccache for improved speed.
pyjet			The interface between FastJet and NumPy
numpythia			The interface between PYTHIA and NumPy
fathon			python package for DFA (Detrended Fluctuation Analysis) and related algorithms
polaroid			Full range of wheels for setuptools rust, with auto release and PyPI deploy.
GSD			Cython and NumPy project with 64-bit wheels.
pybind11 scikit_build_example			An example combining scikit-build and pybind11
pyinstrument_cext			A simple C extension, without external dependencies
xmlstarlet			Python 3.6+ CFFI bindings with true MSVC build.
CorrectionLib			Structured JSON powered correction library for HEP, designed for the CMS experiment at CERN.
Imagecodecs (fork)			Over 20 external dependencies in compiled libraries, custom docker image, libomp, openblas and install_name_tool for macOS.
SiPM			High performance library for SiPM detectors simulation using C++17, OpenMP and AVX2 intrinsics.

Add your repo here! Let us know on GitHub Discussions, or send a PR, adding your information to docs/data/projects.yml.

^{I'd like to include notes here to indicate why an example might be interesting to cibuildwheel users - the styles/technologies/techniques used in each. Please include that in future additions!}