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Top 21 C++ Cxx Projects
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kfr
Fast, modern C++ DSP framework, FFT, Sample Rate Conversion, FIR/IIR/Biquad Filters (SSE, AVX, AVX-512, ARM NEON, RISC-V RVV)
Project mention: Show HN: KFR 7 – major update for C++ DSP library | news.ycombinator.com | 2025-11-17 -
log4cplus
log4cplus is a simple to use C++ logging API providing thread-safe, flexible, and arbitrarily granular control over log management and configuration. It is modelled after the Java log4j API.
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monero-lws
Monero Light Wallet Server (scans monero viewkeys and implements mymonero API). Fast LMDB backend.
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matio-cpp
A C++ wrapper of the matio library, with memory ownership handling, to read and write .mat files.
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XPLPC
Cross Platform Lite Procedure Call - Support Linux, macOS, Windows, iOS, Android, Web Assembly, Flutter, Kotlin, Python and More
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core
A comprehensive set of composable foundational C++ libraries and CMake utilities to power Sourcemeta projects. Note we don't provide any stable ABI/API guarantees to external users outside Sourcemeta (by sourcemeta)
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gtl
A collection of useful well-commented, self-contained, simple, and/or interesting C++ classes (by gpdaniels)
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Hippy.Flex
Hippy.Flex is a lightweight flex layout engine implemented in C++ and used as layout component for Hippy framework in android and ios platform.
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++ Cxx discussion
C++ Cxx related posts
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Webxx: Declarative, composable, concise and fast HTML and CSS in C++
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Show HN: Webxx – Declarative HTML and CSS components for C++
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webxx: Declarative, composable & fast HTML+CSS components
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Should I use platform dependent file IO instead of basic_fstream when performance matters
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Do you regularly back up your game saves? If so, how?
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[Question] getting real-world translation estimate from unit vector returned by ‘recoverPose’
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How would I decompile a pyc file on python 3.10.4?
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Index
What are some of the best open-source Cxx projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | pycdc | 4,470 |
| 2 | kfr | 1,876 |
| 3 | log4cplus | 1,728 |
| 4 | hypervisor | 1,486 |
| 5 | QXlsx | 1,474 |
| 6 | MongoDB C++ Driver | 1,101 |
| 7 | fast_io | 842 |
| 8 | RisohEditor | 491 |
| 9 | libgrape-lite | 441 |
| 10 | LMDB++ | 283 |
| 11 | idyntree | 230 |
| 12 | Feral | 147 |
| 13 | monero-lws | 108 |
| 14 | gta5view | 106 |
| 15 | matio-cpp | 71 |
| 16 | XPLPC | 48 |
| 17 | core | 49 |
| 18 | webxx | 29 |
| 19 | gtl | 28 |
| 20 | yaal | 15 |
| 21 | Hippy.Flex | 1 |
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