JSON for Modern C++

GoogleTest - Google Testing and Mocking Framework

Fast C++ logging library.

A modern formatting library

This is the official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

Simple, secure & standards compliant web server for the most demanding of applications

Seamless operability between C++11 and Python

Apache Arrow is a multi-language toolbox for accelerated data interchange and in-memory processing

A General-purpose Task-parallel Programming System using Modern C++

Crow is very fast and easy to use C++ micro web framework (inspired by Python Flask)

The Fast Cross-Platform Package Manager

The fastest feature-rich C++11/14/17/20/23 single-header testing framework

mlpack: a fast, header-only C++ machine learning library

The public CGAL repository, see the README below

Matplot++: A C++ Graphics Library for Data Visualization 📊🗾

A C++11 library for serialization

Lightweight C++ command line option parser

A beautiful stack trace pretty printer for C++

The cling C++ interpreter

C++ tensors with broadcasting and lazy computing

Compile Time Regular Expression in C++

Shōgun

Jupyter kernel for the C++ programming language

Activity Indicators for Modern C++

A CAD application for creating virtual LEGO models

C++ DataFrame for statistical, Financial, and ML analysis -- in modern C++ using native types and contiguous memory storage

C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE))

Ahead of Time compiler for numeric kernels

Reading, writing, and processing images in a wide variety of file formats, using a format-agnostic API, aimed at VFX applications.

Header-only C++ binding for libzmq