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Top 23 Cpp20 Open-Source Projects
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modern-cpp-tutorial
📚 Modern C++ Tutorial: C++11/14/17/20 On the Fly | https://changkun.de/modern-cpp/
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[openage]https://github.com/SFTtech/openage) - Age of Empires II clone. Python, C++
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Project mention: 3rd Edition of Programming: Principles and Practice Using C++ by Stroustrup | news.ycombinator.com | 2024-04-19
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Project mention: Modern C++ – A collection of resources on modern C++ | news.ycombinator.com | 2024-08-15
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Project mention: Using Jolt with flecs & Dear ImGui: Game Physics Introspection | dev.to | 2024-04-17
EnTT is a popular alternative to flecs for C++, which has different performance/memory characteristics.
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SaaSHub
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catch2 has become fairly bloated. doctest takes all of the best parts of catch2 without all the bloat and the end result is a test framework that is literally over 10x faster than catch2. It's also like 90% compatible with catch2 so porting your tests to it is pretty easy.
Especially if you have a build process that always runs your unit tests, it's nice to have a very fast test/compile/debug loop.
https://github.com/doctest/doctest
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Project mention: C++ Insights – See your source code with the eyes of a compiler | news.ycombinator.com | 2024-04-05
Sorry, I don't know about an Emacs plugin. All the plugins/extensions I'm aware of are listed in the Readme.md: https://github.com/andreasfertig/cppinsights/#c-insights--vi...
I'm happy to add an entry for Emacs once somebody develops a plugin for that editor.
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Project mention: Implementing Regular Expressions in TypeScript Types (Badly) | news.ycombinator.com | 2024-10-20
Hana Dusikova did this in C++ several years ago, with her CTRE library.
https://github.com/hanickadot/compile-time-regular-expressio...
Of course, it has all the usual tradeoffs of compile-time template programming.
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infinity
The AI-native database built for LLM applications, providing incredibly fast hybrid search of dense vector, sparse vector, tensor (multi-vector), and full-text
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concurrencpp
Modern concurrency for C++. Tasks, executors, timers and C++20 coroutines to rule them all
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To dive deeper into Quill or contribute to the project, visit the GitHub repository or the Documentation page.
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filesystem
An implementation of C++17 std::filesystem for C++11 /C++14/C++17/C++20 on Windows, macOS, Linux and FreeBSD.
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SaaSHub
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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).
Cpp20 discussion
Cpp20 related posts
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OpenJazz is a free, open-source version of the classic Jazz Jackrabbit games
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Wisnialang Compiler Project
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Introducing CI Pipeline for Clang-Format Checks in faker-cxx
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Increasing Code Coverage in faker-cxx
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Show HN: An update to my friendly C++ WebGPU open source library
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MQTT turns 25 (and has taken over the world)
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Implementing Regular Expressions in TypeScript Types (Badly)
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A note from our sponsor - CodeRabbit
coderabbit.ai | 24 Mar 2025
Index
What are some of the best open-source Cpp20 projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | modern-cpp-tutorial | 24,577 |
| 2 | modern-cpp-features | 20,226 |
| 3 | shadPS4 | 19,183 |
| 4 | openage | 13,327 |
| 5 | Modern-CPP-Programming | 13,006 |
| 6 | awesome-modern-cpp | 12,198 |
| 7 | entt | 10,774 |
| 8 | doctest | 6,143 |
| 9 | nghttp2 | 4,734 |
| 10 | cppinsights | 4,218 |
| 11 | awesome-hpp | 3,675 |
| 12 | compile-time-regular-expressions | 3,498 |
| 13 | Osiris | 3,443 |
| 14 | infinity | 3,375 |
| 15 | proxy | 2,521 |
| 16 | concurrencpp | 2,496 |
| 17 | quill | 2,069 |
| 18 | async_simple | 1,860 |
| 19 | giada | 1,782 |
| 20 | tomlplusplus | 1,683 |
| 21 | cpp | 1,600 |
| 22 | filesystem | 1,400 |
| 23 | ut | 1,312 |
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