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. Learn more โ
Top 23 C++ multi-platform Projects
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Explore resources on Unity, Unreal Engine, and Godot for more.
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InfluxDB
InfluxDB โ 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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Project mention: I Switched from Flutter and Rust to Rust and Egui | news.ycombinator.com | 2025-06-27
Yes, "immediate" refers just to the API. Source: [1]
[1]: https://github.com/ocornut/imgui/wiki/About-the-IMGUI-paradi...
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ImHex
๐ A Hex Editor for Reverse Engineers, Programmers and people who value their retinas when working at 3 AM.
Project mention: Ask HN: What are good high information density UIs (screenshots, apps, sites) | news.ycombinator.com | 2025-05-08I find Geizhals' filtering options reasonably compact and information dense. https://geizhals.de/?cat=gra16_512&xf=132_16384&pg=1&view=li...
I like the simple table view of RPiLocator. Only a few columns, but lots of rows, no unneeded clutter. https://rpilocator.com/
Not as compact as possible, but at least shows quite some information: GSMArena. It could fit more phones into the comparison table with less whitespace/greyspace though. https://www.gsmarena.com/compare.php3?idPhone1=10386&idPhone...
All sites as viewed on desktop, on mobile this would likely not work out.
I also want to echo the command line tools mention in another comment. GDB's TUI is reasonable for my use, but after some experience this recently posted terminal debugger might be better: https://github.com/al13n321/nnd via https://news.ycombinator.com/item?id=43905185
Also the hex editor I am currently using, despite some problems: https://github.com/WerWolv/ImHex
An example of an information dense GUI that might be a bit overwhelming is Ghidra: https://en.wikipedia.org/wiki/Ghidra (page includes a basic screenshot, you can fill your screen(s) with as many sub windows and information panes as you want)
As a side note, while trying to find examples I realized just how few websites there are (any more?) that show a lot of information at the same time. Worst recent offender is YouTube's redesign with only 3 video tiles in a row on a 1440p screen, luckily easily fixed via a ublock rule.
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Project mention: Developers should embrace creative coding again | news.ycombinator.com | 2025-01-31
Telegrams desktop client[0] is native (C++ with Qt) and it's a joy to use. I don't want an Electron chat app.
[0] https://github.com/telegramdesktop/tdesktop
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TrinityCore
TrinityCore Open Source MMO Framework (master = 11.1.7.61609, 3.3.5 = 3.3.5a.12340, cata classic = 4.4.2.60895)
Project mention: TrinityCore: Open-Source MMO Framework for Wow Expansion Development | news.ycombinator.com | 2024-09-30 -
defold
Defold is a completely free to use game engine for development of desktop, mobile and web games.
Project mention: Free high-performance cross-platform game engine | news.ycombinator.com | 2025-04-18 -
Panda3D
Powerful, mature open-source cross-platform game engine for Python and C++, developed by Disney and CMU
A GitHub repository (like this one)
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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OpenJK
Community effort to maintain and improve Jedi Academy (SP & MP) + Jedi Outcast (SP only) released by Raven Software
Project mention: OpenJK: Game and Engine Powering Jedi Academy and Jedi Outcast | news.ycombinator.com | 2025-06-09 -
pencil
Pencil2D is an easy, intuitive tool to make 2D hand-drawn animations. Pencil2D is open source and cross-platform. (by pencil2d)
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Kratos
Kratos Multiphysics (A.K.A Kratos) is a framework for building parallel multi-disciplinary simulation software. Modularity, extensibility and HPC are the main objectives. Kratos has BSD license and is written in C++ with extensive Python interface. (by KratosMultiphysics)
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Project mention: OpenJazz is a free, open-source version of the classic Jazz Jackrabbit games | news.ycombinator.com | 2025-01-26
Not sure if projects are related, but this also exists:
https://deat.tk/jazz2/
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Server
A Fan-Driven Server Platform Preserving the Legacy of a Legendary MMORPG for Over Two Decades and Going (by EQEmu)
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Vanilla-Conquer
Vanilla Conquer provides clean, cross-platform builds of the C&C Remastered Collection and the standalone legacy games.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
C++ multi-platform discussion
C++ multi-platform related posts
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Open Source Can't Coordinate
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VisionOS Godot Engine support merged
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Ask HN: What are good high information density UIs (screenshots, apps, sites)
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Native visionOS platform support in Godot
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(Godot Engine) Native VisionOS Platform Support
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Free high-performance cross-platform game engine
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Godot 4.4
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A note from our sponsor - InfluxDB
www.influxdata.com | 13 Jul 2025
Index
What are some of the best open-source multi-platform projects in C++? This list will help you:
# | Project | Stars |
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1 | Godot | 98,788 |
2 | imgui | 66,737 |
3 | ImHex | 49,732 |
4 | tdesktop | 27,984 |
5 | TrinityCore | 10,056 |
6 | defold | 5,248 |
7 | Panda3D | 4,827 |
8 | webots | 3,654 |
9 | OpenJK | 2,113 |
10 | pencil | 1,585 |
11 | freac | 1,573 |
12 | kotatogram-desktop | 1,239 |
13 | openspades | 1,167 |
14 | Kratos | 1,140 |
15 | libriscv | 895 |
16 | jazz2-native | 613 |
17 | Server | 556 |
18 | imgui_test_engine | 516 |
19 | Vanilla-Conquer | 415 |
20 | qt-mvvm | 388 |
21 | leaf | 331 |
22 | U3D | 292 |
23 | Degate | 264 |