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Top 23 Cplusplu Open-Source Projects
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Project mention: Proposal: CMake build support · Issue #8896 · ocornut/imgui | news.ycombinator.com | 2025-08-27
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JetBrains
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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In the end of the post Noel mentions Aseprite, but he might be interested in Libresprite as well? https://libresprite.github.io/
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Magic Enum C++
Static reflection for enums (to string, from string, iteration) for modern C++, work with any enum type without any macro or boilerplate code
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More on compiler correctness in general: https://github.com/MattPD/cpplinks/blob/master/compilers.cor... and fuzzing in particular: https://github.com/MattPD/cpplinks/blob/master/compilers.cor...
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Project mention: Introducing Batch Transactions on the XRP Ledger: More Opportunities, Less Friction | dev.to | 2025-06-27
That’s the goal of XLS-56d: Batch Transactions, created by Denis Angell, a powerful new feature now proposed as an amendment on the XRP Ledger.
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Project mention: FLUX1.1 [pro] – New SotA text-to-image model from Black Forest Labs | news.ycombinator.com | 2024-10-03
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open-location-code
Open Location Code is a library to generate short codes, called "plus codes", that can be used as digital addresses where street addresses don't exist.
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bdwgc
The Boehm-Demers-Weiser conservative C/C++ Garbage Collector (bdwgc, also known as bdw-gc, boehm-gc, libgc)
Project mention: Maxima in the browser using Embedded Common Lisp on WASM | news.ycombinator.com | 2025-01-28https://github.com/ivmai/bdwgc/issues/650
Most notably:
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Sevalla
Deploy and host your apps and databases, now with $50 credit! Sevalla is the PaaS you have been looking for! Advanced deployment pipelines, usage-based pricing, preview apps, templates, human support by developers, and much more!
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).
Cplusplus discussion
Cplusplus related posts
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Implementing “Did you mean ...?” Suggestions
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Anonymous Structures in C
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I'm Archiving Picocrypt
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Glaze: Fast, in memory, JSON and reflection library for modern C++
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Unreachable: The Standard Function for Inserting Undefined Behavior
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Show HN: Voice assistant software for ESP32 in C
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C++ MCP Client/Server SDK
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A note from our sponsor - JetBrains
surveys.jetbrains.com | 1 Sep 2025
Index
What are some of the best open-source Cplusplu projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | imgui | 67,849 |
| 2 | CPlusPlusThings | 41,317 |
| 3 | Vcpkg | 25,490 |
| 4 | quicktype | 13,266 |
| 5 | Apache Thrift | 10,778 |
| 6 | ChakraCore | 9,203 |
| 7 | conan | 8,922 |
| 8 | Piccolo | 6,364 |
| 9 | LibreSprite | 6,196 |
| 10 | Magic Enum C++ | 5,645 |
| 11 | Apache Mesos | 5,328 |
| 12 | gaia | 5,233 |
| 13 | cpplinks | 5,071 |
| 14 | rippled | 4,955 |
| 15 | Boost.Beast | 4,617 |
| 16 | cppinsights | 4,372 |
| 17 | stable-diffusion.cpp | 4,350 |
| 18 | open-location-code | 4,237 |
| 19 | awesome-hpp | 3,856 |
| 20 | cppcoro | 3,627 |
| 21 | qt-material-widgets | 3,431 |
| 22 | CppPrimer | 3,337 |
| 23 | bdwgc | 3,296 |
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