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Top 23 CPP Open-Source Projects
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1️⃣6️⃣ Project-Based Learning 🔨 📌 https://github.com/practical-tutorials/project-based-learning A collection of hands-on projects to improve your coding skills.
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.
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awesome-cpp
A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny things. Inspired by awesome-... stuff.
Awesome C++ Modern Cpp Awesome cpp examples LearnCPP CPP best practises
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leetcode-master
《代码随想录》LeetCode 刷题攻略：200道经典题目刷题顺序，共60w字的详细图解，视频难点剖析，50余张思维导图，支持C++，Java，Python，Go，JavaScript等多语言版本，从此算法学习不再迷茫！🔥🔥 来看看，你会发现相见恨晚！🚀
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leetcode
LeetCode Solutions: A Record of My Problem Solving Journey.( leetcode题解，记录自己的leetcode解题之路。) (by azl397985856)
1️⃣3️⃣ LeetCode Solutions 🏆 📌 https://github.com/azl397985856/leetcode A collection of LeetCode solutions to prepare for FAANG interviews.
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ImHex
🔍 A Hex Editor for Reverse Engineers, Programmers and people who value their retinas when working at 3 AM.
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In fact, even in the absence of these commercial databases, users can effortlessly install PostgreSQL and leverage its built-in pgvector functionality for vector search. PostgreSQL stands as the benchmark in the realm of open-source databases, offering comprehensive support across various domains of database management. It excels in transaction processing (e.g., CockroachDB), online analytics (e.g., DuckDB), stream processing (e.g., RisingWave), time series analysis (e.g., Timescale), spatial analysis (e.g., PostGIS), and more. For non-professional users seeking to explore vector databases, they can readily download the open-source PostgreSQL or utilize managed services like Supabase and Neon to establish their own basic AI applications. Other than PostgreSQL, several open-source databases, including OpenSearch, ClickHouse, and Cassandra, have implemented their own vector search functionality. You do not need to adopt a new vector database if you have already used these systems.
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CodeRabbit
CodeRabbit: AI Code Reviews for Developers. Revolutionize your code reviews with AI. CodeRabbit offers PR summaries, code walkthroughs, 1-click suggestions, and AST-based analysis. Boost productivity and code quality across all major languages with each PR.
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carbon-lang
Carbon Language's main repository: documents, design, implementation, and related tools. (NOTE: Carbon Language is experimental; see README)
Project mention: Kickstart insight needed: A new retrofitted C dialect? | news.ycombinator.com | 2025-02-22Kind of along these lines but for C++: https://docs.carbon-lang.dev/
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openpose
OpenPose: Real-time multi-person keypoint detection library for body, face, hands, and foot estimation
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View the Project on GitHub
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C-Plus-Plus
Collection of various algorithms in mathematics, machine learning, computer science and physics implemented in C++ for educational purposes.
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> Won't fix: https://github.com/microsoft/calculator/issues/148
I don't see how one can expect them to take a report worded this way seriously. Perhaps if they actually reported the crash without the tantrum the team would fix it.
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Project mention: Dragonfly: Modern Replacement for Redis and Memcached | news.ycombinator.com | 2025-03-31
Great blog with a lot of good stuff. Loved their Scalable In Memory Dragonfly Swarm post, for example. https://www.dragonflydb.io/blog/announcing-dragonfly-swarm-s...
I do wish they did more to show folks how to go deeper in integrating Dragonfly. A readme update 2 years ago talked about a native distributed log that would offer super fast option for integrators. That's the sort of super neat stuff that will entice geeks to come play: not just redis but faster, but having a deeper connection to the machine, to seeing what else is possible. https://github.com/dragonflydb/dragonfly/blame/main/README.m...
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Well, I wouldn't call it much of a "logger", per se. It is more like a collection of useful macros that print to the console using some pretty colors. I did have in mind to use the spdlog library since I do know that it is quite fast and has a lot of useful functionalities. But if you have read my previous devlog, you would know I do not like to use a lot of dependencies. I felt like logging was something that I could handle on my own without adding another dependency. And so I did. With a lot of help, though.
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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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re: C/C++ development: anybody using conda/pixi for dependency management? Here's an example of compiling a C++ SDL program using pixi and the SDL dependency from conda-forge [1].
Seems viable as a replacement for things like vckpg [2] which only builds from source.
I'm still researching this but it seems like rattler [3] is the tool to use to build/publish packages. The supported repos are: prefix.dev's own hosting, anaconda.org, artifactory or a self-hosted server.
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1: https://github.com/prefix-dev/pixi/blob/main/examples/cpp-sd...
2: https://github.com/microsoft/vcpkg
3: https://prefix-dev.github.io/rattler-build/latest/authentica...
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Project mention: Why Apple's Severance Gets Edited over Remote Desktop Software | news.ycombinator.com | 2025-03-29
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Solidity
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Project mention: Tiny renderer or how OpenGL works: software rendering in 500 lines of code | news.ycombinator.com | 2025-03-13
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it's probably not chrome because they are using this third party library: (https://github.com/fmtlib/fmt). also, it might be that this sink is actually meant to write a message to the console but due to configuration options its a noop.
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Catch
A modern, C++-native, test framework for unit-tests, TDD and BDD - using C++14, C++17 and later (C++11 support is in v2.x branch, and C++03 on the Catch1.x branch)
The C++ testing framework Catch2 enables this kind of testing. The first time I saw it I couldn't figure out how some of the tests would even pass.
It turns out that using some evil macro magic, each test re-runs from the start for each inner section [1]. It also makes deduplicating setup code completely painless and natural.
You just have to get over the completely non-standard control flow. It's a good standard bearer for why metaprogramming is great, even if you're forced to do it in C/C++'s awful macro system.
[1] https://github.com/catchorg/Catch2/blob/devel/docs/tutorial....
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
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).
CPP discussion
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cmdfx v0.1.3 - Physics Engine in the Terminal
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Modern CMake
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A note from our sponsor - InfluxDB
influxdata.com | 26 Apr 2025
Index
What are some of the best open-source CPP projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | project-based-learning | 225,077 |
| 2 | awesome-cpp | 63,149 |
| 3 | leetcode-master | 55,701 |
| 4 | leetcode | 55,274 |
| 5 | ImHex | 48,647 |
| 6 | CPlusPlusThings | 40,928 |
| 7 | ClickHouse | 40,307 |
| 8 | carbon-lang | 32,813 |
| 9 | openpose | 32,350 |
| 10 | aseprite | 31,739 |
| 11 | C-Plus-Plus | 31,675 |
| 12 | calculator | 30,249 |
| 13 | dragonfly | 27,749 |
| 14 | spdlog | 25,957 |
| 15 | modern-cpp-tutorial | 24,700 |
| 16 | Vcpkg | 24,593 |
| 17 | Sunshine | 24,518 |
| 18 | solidity | 24,282 |
| 19 | shadPS4 | 21,909 |
| 20 | tinyrenderer | 21,720 |
| 21 | {fmt} | 21,682 |
| 22 | modern-cpp-features | 20,331 |
| 23 | Catch | 19,320 |
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