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Top 23 C++ C Projects
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srs
SRS is a simple, high-efficiency, real-time media server supporting RTMP, WebRTC, HLS, HTTP-FLV, HTTP-TS, SRT, MPEG-DASH, and GB28181.
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FlatBuffers, also developed by Google, is a highly optimized serialization library designed for scenarios where zero-copy deserialization is required.
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"Emulator" is the wrong word, but the answer is yes. The word you actually meant was "re-implementation" - writing a completely new, clean-room program which reads Source data files (levels, assets, scripts) and allows the user to play a Source game is perfectly legal.
It is necessary to avoid distributing any copyrighted material, so the user must provide the game assets from a legitimate copy for using the program to be legal. In addition, the 'clean-room' must be maintained by ensuring that no contributors to the re-implementation have ever seen the source code for Source, or they become tainted with forbidden knowledge.
Indeed, it's quite common for beloved old games to be re-implemented on new codebases to allow easy play on modern OS's and at high resolution, etc.
See https://github.com/Interkarma/daggerfall-unity, https://openrct2.io/, https://github.com/AlisterT/openjazz
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webview
Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).
Project mention: webview: Tiny cross-platform webview library for C/C++ | news.ycombinator.com | 2024-05-28 -
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stellarium
Stellarium is a free GPL software which renders realistic skies in real time with OpenGL. It is available for Linux/Unix, Windows and macOS. With Stellarium, you really see what you can see with your eyes, binoculars or a small telescope.
This is very cool, and looks like it targets you wanting to look stuff up and I will probably use it at some point.
But I feel that anyone looking at this and thinking "oh that's cool" should also try installing Stellarium (https://stellarium.org/). It lets you see what you can see in the night sky from any location/time on Earth, and is really useful for helping you identify what you're seeing in the night sky.
I don't mean to distract from this, because it's also great. It's just a second tool that anyone with a passing interest in astronomy should be aware of.
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I decided to look for a trending GitHub repository written in C++, my favorite programming language. I came across a very intriguing repository called cppcheck. Why did it catch my attention? Well, we all know about ESLint and Prettier, but a linter for C++? Now, that is something I just had to explore!
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fswatch
A cross-platform file change monitor with multiple backends: Apple macOS File System Events, *BSD kqueue, Solaris/Illumos File Events Notification, Linux inotify, Microsoft Windows and a stat()-based backend.
Project mention: It is never too later to write your own C/C++ command-line utilities | news.ycombinator.com | 2024-09-28In this case, the best tool for the job is the one that will let you:
1. Continue to easily iterate on the solution now and in the future (compiled languages have a built-in hinderance, in that you never know when a given binary corresponds to some state of the source tree)
2. Allow you to trivially talk to inotify/ReadDirectoryChangesW /FSEvents/kqueue/etc so that you only need to read the file when it actually changes
3. Minimise maintenance (installing third-party headers/libraries, setting up a project, etc etc)
I think the answer here is the shell, fswatch, and jq.
https://github.com/emcrisostomo/fswatch https://github.com/jqlang/jq http://man.openbsd.org/sh
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inotify-tools
inotify-tools is a C library and a set of command-line programs providing a simple interface to inotify.
Note that entr doesn't recursively watch for file changes. It has a list of files it watches for changes, but this list isn't amended when new files are added. Fundamentally that's a fairly small subset of proper recursive file watching. A more comparable project in terms of just watching files is https://github.com/inotify-tools/inotify-tools.
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Project mention: Ask HN: What Are You Working On? (February 2025) | news.ycombinator.com | 2025-02-23
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OpenJK
Community effort to maintain and improve Jedi Academy (SP & MP) + Jedi Outcast (SP only) released by Raven Software
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Project mention: xlskubectl – a spreadsheet to control your Kubernetes cluster | news.ycombinator.com | 2025-03-12
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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).
C++ C discussion
C++ C related posts
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Fibonacci Hashing: The Optimization That the World Forgot
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A steam locomotive from 1993 broke my yarn test
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DocWire new release 2025.03.24 is here
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Harfbuzz Release 11.0.0
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Show HN: NeKernel – An OS Kernel with a custom filesystem
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Stupid Smart Pointers in C
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DocWire 2025.03.02 release is here
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A note from our sponsor - SaaSHub
www.saashub.com | 16 May 2025
Index
What are some of the best open-source C projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | srs | 26,899 |
| 2 | FlatBuffers | 24,190 |
| 3 | rpcs3 | 16,849 |
| 4 | OpenRCT2 | 14,300 |
| 5 | webview | 13,084 |
| 6 | Apache Thrift | 10,684 |
| 7 | stellarium | 8,662 |
| 8 | GuiLite | 7,482 |
| 9 | Cppcheck | 6,145 |
| 10 | algorithms_and_data_structures | 6,019 |
| 11 | fswatch | 5,244 |
| 12 | glslViewer | 4,947 |
| 13 | nghttp2 | 4,777 |
| 14 | ArrayFire | 4,700 |
| 15 | harfbuzz | 4,612 |
| 16 | inotify-tools | 3,264 |
| 17 | cmake-cookbook | 2,769 |
| 18 | faust | 2,727 |
| 19 | zrythm | 2,471 |
| 20 | ccache | 2,469 |
| 21 | Teeworlds | 2,468 |
| 22 | OpenJK | 2,096 |
| 23 | kubedoom | 2,074 |
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