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Top 23 C++ cpp23 Projects
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thread-pool
BS::thread_pool: a fast, lightweight, modern, and easy-to-use C++17 / C++20 / C++23 thread pool library
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mp-units
The Domain-Correct Quantities and Units Library for C++ — full quantity kind safety, ISO 80000 compliant, C++29 standardization candidate.
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Project mention: Show HN: C/C++ Cheatsheet – a modern, practical reference for C and C++ | news.ycombinator.com | 2026-01-22
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Project mention: C++20 Modules: Practical Insights, Status and TODOs | news.ycombinator.com | 2025-09-11
We are building a document rendering tool using them. It’s a pretty large project, and there have been some really good improvements in Clang’s implementation of C++20 modules in the past few versions.
https://github.com/odoo/paper-muncher/blob/main/src/vaev-eng...
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There is one pretty serious C++ parser project: https://github.com/robertoraggi/cplusplus
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malloy
A cross-platform C++23 library providing embeddable server & client components for HTTP and WebSocket. (by Tectu)
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ cpp23 discussion
C++ cpp23 related posts
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Show HN: Pushing a non-blocking C++ web server to 58k req/SEC using kqueue
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Rewriting a FIX Engine in C++23: What Got Simpler (and What Didn't)
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Rewriting a FIX Engine in C++23: What Got Simpler (and What Didn't)
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NexusFix: Zero-alloc compile-time hardened FIX engine for sub-100ns execution
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C++20 Modules: Practical Insights, Status and TODOs
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Hyprland – Tiling Compositor with the Looks
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Hyprland has officially moved away from wlroots
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A note from our sponsor - SaaSHub
www.saashub.com | 13 Jun 2026
Index
What are some of the best open-source cpp23 projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Modern-CPP-Programming | 15,735 |
| 2 | doctest | 6,760 |
| 3 | cppinsights | 4,496 |
| 4 | thread-pool | 3,006 |
| 5 | giada | 2,026 |
| 6 | cpp | 1,660 |
| 7 | mp-units | 1,432 |
| 8 | liblava | 884 |
| 9 | saucer | 862 |
| 10 | obfuscator | 846 |
| 11 | real-time-cpp | 795 |
| 12 | icecream-cpp | 744 |
| 13 | aitoolkit | 519 |
| 14 | roq-api | 506 |
| 15 | mdspan | 500 |
| 16 | cppcheatsheet | 269 |
| 17 | paper-muncher | 260 |
| 18 | librapid | 180 |
| 19 | roq-cpp-samples | 168 |
| 20 | cplusplus | 153 |
| 21 | fkYAML | 143 |
| 22 | terlang | 86 |
| 23 | malloy | 84 |
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