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Top 23 C++ Library Projects
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Project mention: Ask HN: What are good high information density UIs (screenshots, apps, sites) | news.ycombinator.com | 2025-05-08
I find the imgui UIs to be very high density (https://github.com/ocornut/imgui and the gallery issues) See for example the tracy profiler: https://github.com/wolfpld/tracy. It seems the game dev community has pretty powerful tools to understand and interrogate their work.
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webview
Tiny cross-platform webview library for C/C++. Uses WebKit (GTK/Cocoa) and Edge WebView2 (Windows).
Project mention: Show HN: Vaev โ A browser engine built from scratch (It renders google.com) | news.ycombinator.com | 2025-05-18What do you mean by that? WebView is just Chrome embedded inside of an Android app. Same thing already exists on Windows (Edge WebView2), macOS (WKWebView) and Linux (WebKitGTK). There's also a library that wraps all of them into a single interface:
https://github.com/webview/webview
The entire point of WebView is that it's a browser embedded inside of a different application, how do you expect it to be a "standalone project"?
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Project mention: SQLite-on-the-Server Is Misunderstood: Better at Hyper-Scale Than Micro-Scale | news.ycombinator.com | 2025-03-03
TDLib (Telegram Database library)[0] uses SQLite.
In Telegram Bot API, each TDLib instance handles more than 24,000 active bots simultaneously.[1]
[0]: https://github.com/tdlib/td
[1]: https://core.telegram.org/tdlib
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Project mention: Building a BitTorrent client from the ground up in Go | news.ycombinator.com | 2025-02-24
It's not impossible, it's just hard to be better than libtorrent, otherwise a new client only makes sense as an exercise.
Arvid Norberg is hardly a "beginner developer", yet look how hard it is to make a performant implementation of uTP: https://github.com/arvidn/libtorrent/issues/3542
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Project mention: Cgal: A Powerful Open-Source Computational Geometry Library | news.ycombinator.com | 2024-08-06
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Clipboard
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Arduino-IRremote
Infrared remote library for Arduino: send and receive infrared signals with multiple protocols
Project mention: IRRemote ็จๅผๅบซๆญ้ Adafruit_NeoPoxel ็จๅผๅบซ็ๅ้ก | dev.to | 2024-12-23 -
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Project mention: Exploring biphasic programming: a new approach in language design | news.ycombinator.com | 2024-07-02
I'm going to hijack the mention of ML to share xbyaku, a c++ library presenting a DSL for assembling machine code at runtime (useful for JIT).
It's used by some of the pytorch back ends.
https://github.com/herumi/xbyak
Example use: https://github.com/oneapi-src/oneDNN/blob/main/src/cpu/aarch...
I learned about these through a blog post about speeding up pytorch on ARM: https://pytorch.org/blog/optimized-pytorch-w-graviton/
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projectm
projectM - Cross-platform Music Visualization Library. Open-source and Milkdrop-compatible.
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There are alternative STL-like libraries designed for embedded use: https://github.com/ETLCPP/etl
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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++ Library discussion
C++ Library related posts
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Tracy profiler new release 0.12.0
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Ask HN: What are good high information density UIs (screenshots, apps, sites)
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Wikipedia: Database Download
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Harfbuzz Release 11.0.0
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Intel RealSense Stereo Depth Cameras
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C++ logging library โ something I've been working on
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Lwlog: Fast synchronous and asynchronous C++17 logging library
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A note from our sponsor - SaaSHub
www.saashub.com | 13 Jun 2025
Index
What are some of the best open-source Library projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | imgui | 66,091 |
| 2 | webview | 13,147 |
| 3 | tracy | 12,033 |
| 4 | Apache Thrift | 10,699 |
| 5 | librealsense | 7,978 |
| 6 | td | 7,758 |
| 7 | cpr | 6,922 |
| 8 | libtorrent | 5,543 |
| 9 | CGal | 5,393 |
| 10 | Clipboard | 5,247 |
| 11 | Arduino-IRremote | 4,736 |
| 12 | harfbuzz | 4,679 |
| 13 | oneDNN | 3,808 |
| 14 | projectm | 3,689 |
| 15 | rttr | 3,298 |
| 16 | indicators | 3,204 |
| 17 | argparse | 3,089 |
| 18 | contour | 2,689 |
| 19 | proxy | 2,686 |
| 20 | etl | 2,507 |
| 21 | plog | 2,346 |
| 22 | FunctionalPlus | 2,192 |
| 23 | tabulate | 2,022 |
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