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Top 23 C++ Openmp Projects
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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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mixbench
A GPU benchmark tool for evaluating GPUs and CPUs on mixed operational intensity kernels (CUDA, OpenCL, HIP, SYCL, OpenMP)
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ForkUnion
Lower-latency OpenMP-style minimalistic scoped thread-pool designed for 'Fork-Join' parallelism in Rust and C++, avoiding memory allocations, mutexes, CAS-primitives, and false-sharing on the hot path 🍴
As mentioned in the docstring above, using STL's `std::hardware_destructive_interference_size` won't help you. On ARM, this issue becomes even more pronounced, so concurrency-heavy code should ideally be compiled multiple times for different coherence protocols and leverage "dynamic dispatch", similar to how I & others handle SIMD instructions in libraries that need to run on a very diverse set of platforms.
[1] https://github.com/ashvardanian/ForkUnion/blob/46666f6347ece...
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Project mention: Show HN: Spheni – A Vector Search Engine in C++ built from scratch, for Python | news.ycombinator.com | 2026-02-11
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ParallelReductionsBenchmark
Thrust, CUB, TBB, AVX2, AVX-512, CUDA, OpenCL, OpenMP, Metal, and Rust - all it takes to sum a lot of numbers fast!
I was asked this a few months back but don’t have the measurements fresh anymore. In general, I think TBB is one of the more thorough and feature-rich parallelism libraries out there. That said, I just found a comparable usage example in my benchmarks, and it doesn’t look like TBB will have the same low-latency profile as Fork Union: https://github.com/ashvardanian/ParallelReductionsBenchmark/...
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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++ Openmp discussion
C++ Openmp related posts
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Myths Programmers Believe about CPU Caches
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Fork Union: Beyond OpenMP in C++ and Rust?
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Support for a6700?
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A7R V RAW Support
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Anyone know a more efficient method to use for cracking this zip?
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bkcrack - Crack legacy zip encryption with Biham and Kocher's known plaintext attack.
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How does one crack a ZIP file password when you have access to one of the files from the ZIP file?
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A note from our sponsor - SaaSHub
www.saashub.com | 8 Jun 2026
Index
What are some of the best open-source Openmp projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | CTranslate2 | 4,507 |
| 2 | oneDNN | 3,998 |
| 3 | Kratos | 1,279 |
| 4 | stdgpu | 1,263 |
| 5 | faasm | 924 |
| 6 | amgcl | 864 |
| 7 | open.mp | 602 |
| 8 | ginkgo | 598 |
| 9 | muparser | 517 |
| 10 | mixbench | 459 |
| 11 | rawspeed | 450 |
| 12 | occa | 441 |
| 13 | alpaka | 414 |
| 14 | BabelStream | 363 |
| 15 | primecount | 354 |
| 16 | ForkUnion | 330 |
| 17 | mcmap | 327 |
| 18 | monolish | 201 |
| 19 | spheni | 182 |
| 20 | ParallelReductionsBenchmark | 118 |
| 21 | MandelbrotSSE | 91 |
| 22 | hpdbscan | 44 |
| 23 | parallel-kd-tree | 36 |
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