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Top 19 C++ Portable Projects
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Go to the Cmder download page
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Project mention: Microsoft is open sourcing Windows 11's UI framework | news.ycombinator.com | 2025-08-02
No, it implements its own functionality. As an example consider one of the most basic controls which is available pretty much everywhere (i.e. no need for polyfill), the push button: the source code[0] for QPushButton clearly implements the behavior itself, it does not rely on any native button.
Compare with wxWidgets' equivalent to QPushButton, wxButton, where there is a backend-specific header[1] and implementation[2] where 99% of the wxButton functionality is there (there is a `btncmn.cpp` under `common` that is shared across backends but that has very little code itself).
[0] https://github.com/qt/qtbase/blob/dev/src/widgets/widgets/qp...
[1] https://github.com/wxWidgets/wxWidgets/blob/master/include/w...
[2] https://github.com/wxWidgets/wxWidgets/blob/master/src/msw/b...
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RBDOOM-3-BFG
Doom 3 BFG Edition source port with updated DX12 / Vulkan renderer and modern game engine features
Project mention: Advances in Real-Time Rendering in Games, Siggraph 2025 | news.ycombinator.com | 2025-08-28A lot of the id tech 8 global illumination techniques described in that presentation were already implemented by Robert Beckebans in his Doom 3 fork: https://github.com/RobertBeckebans/RBDOOM-3-BFG
It is one of the few engines out there that implement NVRHI properly. It is pretty exciting to see the evolution of the project.
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InfluxDB
InfluxDB – 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: Understanding SIMD: Infinite Complexity of Trivial Problems | news.ycombinator.com | 2024-11-30
I'm surprised no one has mentioned Vc. I found ispc clunky and not as performant, and std::simd didn't support some useful math ops like rsqrt. Vc has been around for years, I have no trouble including it in my codes, it has masking and many of the most useful math ops, and I can get over 1 TF/s on a consumer-grade Ryzen and at least 3 TF/s on the big Epyc CPUs.
https://github.com/VcDevel/Vc
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Avian
[INACTIVE] Avian is a lightweight virtual machine and class library designed to provide a useful subset of Java's features, suitable for building self-contained applications. (by ReadyTalk)
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xtd
Free open-source modern C++20 framework to create console (CLI), forms (GUI like WinForms) and unit test (xUnit) applications and libraries on Windows, macOS, Linux, iOS, Android, FreeBSD, and Haiku.
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MIPP
Portable wrapper for SIMD and vector instructions written in C++11. Compatible with NEON, SSE, AVX, AVX-512 and SVE (length specific).
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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).
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A note from our sponsor - Sevalla
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Index
What are some of the best open-source Portable projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | cmder | 26,534 |
| 2 | wxWidgets | 6,773 |
| 3 | picotorrent | 2,700 |
| 4 | dhewm3 | 1,974 |
| 5 | utfcpp | 1,784 |
| 6 | RBDOOM-3-BFG | 1,673 |
| 7 | freac | 1,613 |
| 8 | Vc | 1,491 |
| 9 | Avian | 1,231 |
| 10 | xtd | 1,051 |
| 11 | hash-library | 512 |
| 12 | MIPP | 507 |
| 13 | Doomsday-Engine | 281 |
| 14 | sqlite_blaster | 183 |
| 15 | Stroika | 137 |
| 16 | flatimage | 95 |
| 17 | std_find_simd | 21 |
| 18 | iara | 13 |
| 19 | sqlite_blaster_python | 9 |
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