Cpp17 GitHub Repositories (2026) · Open Source Tools

FluentQt (Fluent-Qt): Fluent / WinUI-style Qt Widgets UI components and Gallery for native C++ desktop apps, with optional PySide6 bindings and WebAssembly.

QtPass is a multi-platform GUI for pass, the standard unix password manager.

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

API and library for MAVLink compatible systems written in C++

Fast and exact implementation of the C++ from_chars functions for number types: 4x to 10x faster than strtod, part of GCC 12, MySQL, DuckDB, Chromium, Redis and WebKit/Safari

A fast & densely stored hashmap and hashset

A modern C++17/C++20 glTF 2.0 library focused on speed, correctness, and usability

Argument Parser for Modern C++

A Symbian OS/N-Gage emulator

C++ wrappers for SIMD intrinsics and parallelized, optimized mathematical functions (SSE, AVX, AVX512, NEON, SVE, WebAssembly, VSX, RISC-V))

A free, open source music workstation built around the grid.

std::tuple like methods for user defined types without any macro or boilerplate code

Parsing Expression Grammar Template Library

Open-source C++17 engine for backtesting and forward execution, with a versioned C ABI; Pine Script v6 runs through code generation. Against TradingView's own trade lists, all 7,989 graded probes (309 open-corpus strategies, 741 closed-test scripts) grade excellent or strong: 7,983 excellent, 6 strong. Apache-2.0.

nanobind: tiny and efficient C++/Python bindings

Nameof operator for modern C++, simply obtain the name of a variable, type, function, macro, and enum

Cista is a simple, high-performance, zero-copy C++ serialization & reflection library.

3D Maps & Terrain SDK (C++)

C++-based high-performance parallel environment execution engine (vectorized env) for general RL environments.

Easy to use C++17 HTTP Server with no compromise on performances. https://matt-42.github.io/lithium