Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

JSON for Modern C++

An open-source C++ library developed and used at Facebook.

Distribute and run LLMs with a single file.

A modern formatting library

A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)

Seamless operability between C++11 and Python

mawww's experiment for a better code editor

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

Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code

Lightweight C++ command line option parser

Non-Metric Space Library (NMSLIB): An efficient similarity search library and a toolkit for evaluation of k-NN methods for generic non-metric spaces.

EntityX - A fast, type-safe C++ Entity-Component system

C++ compile-time enum to string, iteration, in a single header file

macOS Quick Look extension for Markdown files.

GRBL controller application with G-Code visualizer written in Qt.

A global, black box optimization engine for real world metric optimization.

Using Dijkstra's algorithm ("finding the shortest paths between nodes in a graph") to draw maps 🌍.

A vim plugin for libclang-based highlighting of C, C++, ObjC

Tool to check C++ #include dependencies (dependency graphs created in .dot format)

🍥 A new take on polymorphism

JSON schema validator for JSON for Modern C++

Exports models from Minecraft for 3D printing or rendering

Reflang - Modern C++ reflection using libclang

curve fitting (peak fitting) software

The C++ Network Library Project -- header-only, cross-platform, standards compliant networking library.

N-Dimensional Fast Methods: Fast Marching, Fast Sweeping, Group Marching, Fast Iterative, etc.

Clang-based C/C++/Objective-C refactoring toolset