Life & fun · alternatives · 2026

24 alternatives to SyNumpy – a Header only C++17 library for working with NumPy Arrays

A C++17 library for reading and writing NumPy .npy files, with optional .npz (zip) archive support - symisc/sy-numpy-cpp

SyNumpy is a header-only C++17 library that enables developers to work with NumPy arrays directly from C++ code. It is designed for programmers who need to integrate NumPy data structures into C++ applications without… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1
Coros – A Modern C++ Library for Task Parallelism▲129
Hello Hacker News. I’m Martin, a graduate student from Prague, and I’ve been working on Coros, a C++ library for task-based parallelism. After spending some time with OpenMP and oneTBB, I wanted to try building a library using modern features from the C++ standard library. I’ve used coroutines for task encapsulation and C++23 expected for exception handling, while trying to maintain good performance. Additionally, I’ve implemented monadic-like behavior to allow easy chaining of tasks, similar to the monadic operations in std::expected. You can check out the project here:…
2024 · github.com · its alternatives →
2
A Fast, Malloc-Free C++14 Json Parser and Encoder▲98
Meta programming utilities for C++14. Merged in matt-42/lithium - matt-42/iod
2014 · github.com · its alternatives →
3
Rust Vector and Quaternion Lib▲128
I use this library I made for Vectors and Quaternions in many personal projects. I've open-sourced it, in case anyone else would get use out of it. I use this on various projects, including quadcopter firmware, a graphics engine, a cosmology simulation, and several molecular dynamics applications. No_std compatible.
2025 · github.com · its alternatives →
4
Match(it): A C++17 pattern-matching library with lots of good stuffs▲85
A lightweight single-header pattern-matching library for C++17 with macro-free APIs. Try it at https://godbolt.org/z/8YMr8Kz8j
2022 · github.com · its alternatives →
5
Python library for functional programming▲129
Python library for creating data pipelines with chain functional programming - EntilZha/PyFunctional
2017 · github.com · its alternatives →
6
RaftLib – Easy, productive parallel programming in C++▲62
Simple, easy to use stream computation library for C++.
2016 · raftlib.io · its alternatives →
7
Moustique – C++14 coroutine-based non-blocking IO on Linux▲68
C++14 high performance non-blocking network IO (based on epoll + boost.context) - matt-42/moustique
2018 · github.com · its alternatives →
8IB
I built a minimal Forth-like stack interpreter library in C▲47
This weekend I created stacklib.h - a single-header library that brings Forth-style stack operations to C. It implements a basic interpreter with: - Stack operations (push/pop/dup/swap/over/drop) - Arithmetic (+, -, *, /) - Output (., emit, cr) - Stack inspection (.s, depth) Example usage: Stack s; stack_init(&s); dict_init(); exec(&s, "10 20 + ."); // Prints "30" exec(&s, "1 2 3 4 .s"); // Shows stack contents The library is self-contained, requires no dependencies, and handles basic error checking. It was inspired by wanting to understand…
2025 · its alternatives →
9
Compile-time HTML parsing in C++14▲175
A C++ HTML template engine that uses compile time HTML parsing - rep-movsd/see-phit
2017 · github.com · its alternatives →
10
A hash array-mapped trie implementation in C▲171
Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…
2023 · github.com · its alternatives →
11
A C++ dump func. that can print multi-D vectors, maps, tuples, and all▲82
A C++ library for debugging purposes that can print any variable, even user-defined types. - philip82148/cpp-dump
2023 · github.com · its alternatives →
12
CXXStateTree – A modern C++ library for hierarchical state machines▲48
Hi HN! I've built [CXXStateTree](https://github.com/ZigRazor/CXXStateTree), a modern C++ header-only library to create hierarchical state machines with clean, intuitive APIs. It supports: - Deeply nested states - Entry/exit handlers - State transitions with guards and actions - Asynchronous transitions with `co_await` (C++20 coroutines) - Optional runtime type identification for flexibility It's ideal for complex control logic, embedded systems, games, robotics, and anywhere you'd use a finite state machine. I’d love feedback, use cases, or contributions from the…
2025 · github.com · its alternatives →
13
Prometeo – a Python-to-C transpiler for high-performance computing▲166
An experimental Python-to-C transpiler and domain specific language for embedded high-performance computing - zanellia/prometeo
2021 · github.com · its alternatives →
14
I built a tensor library from scratch in C++/CUDA▲119
Hi HN, Over the past few months, I've been building `dsc`, a tensor library from scratch in C++/CUDA. My main focus has been on getting the basics right, prioritizing a clean API, simplicity, and clear observability for running small LLMs locally. The key features are: - C++ core with CUDA support written from scratch. - A familiar, PyTorch-like Python API. - Runs real models: it's complete enough to load a model like Qwen from HuggingFace and run inference on both CUDA and CPU with a single line change[1]. - Simple, built-in observability for both Python and C++. Next on the roadmap is…
2025 · github.com · its alternatives →
15
NasNas, a new intuitive and user friendly C++ game framework▲95
An intuitive and beginner friendly 2D game framework for C++ - Madour/NasNas
2020 · github.com · its alternatives →
16
Fast Random Library for C++17▲52
Morning HN. Random number generation feels is a somewhat underrepresented topic in the C++ realm. There is a lot of questionable info about it found online and even the standard library is quite behind the times in terms of it's algorithms. It suffers from trying to accommodate sometimes impractical standard requirements and has several ways of getting significantly bad statistical results. This leaves a lot easily achievable performance & quality on the table. So, being a mathematician who mostly works with stochastic models and wants these models to run fast and well, I embarked on a…
2025 · github.com · its alternatives →
17
Asymmetric stackful cross-platform Coroutines in pure C▲39
Single header stackful cross-platform coroutine library in pure C. - edubart/minicoro
2021 · github.com · its alternatives →
18
libcodr7 – fundamental collections in the spirit of C▲67
fundamental tools in the spirit of C. Contribute to codr7/libcodr7 development by creating an account on GitHub.
2019 · github.com · its alternatives →
19
Copy-and-patch compiler for hard real-time Python▲65
I built Copapy as an experiment: Can Python be used for hard real-time systems? Instead of an interpreter or JIT, Copapy builds a computation graph by tracing Python code and uses a custom copy-and-patch compiler. The result is very fast native code with no GC, no syscalls, and no memory allocations at runtime. The copy-and-patch compiler currently supports x86_64 as well as 32- and 64-bit ARM. It comes as small Python package with no other dependencies - no cross-compiler, nothing except Python. The current focus is on robotics and control systems in general. This project is early but…
Feb 2026 · github.com · its alternatives →
20
Header-only, extensible C++17 argument parser▲21
⛳ Simple, extensible, header-only C++20 argument parser released into the public domain. - sailormoon/flags
2016 · github.com · its alternatives →
21
Rust framework for advanced file recognition and identification▲46
Alternative to magic.h and infer. Zero dependencies. Fully extensible. Works in no_std, async, and embedded contexts.
2025 · crates.io · its alternatives →
22
Single-Header Profiler for C++17▲68
Morning HN. I often found myself wondering "how much does this code segment take in terms of total runtime" and it's often quite annoying to figure out with optimizations enabled, especially when working on something new or testing someone else's implementation without the proper tooling set up. Wanted to have a single include lib that would allow us to write something like: ``` PROFILE("Loop 1") for (...) // some work ``` and have the next expression automatically record time & dump results to a table. Wrote a few macros to do exactly that a few months back, but they were…
2025 · github.com · its alternatives →
23
C++17 RISC-V RV32GC / RV64GC userspace emulator library▲31
The fastest RVA23 RISC-V sandbox. Contribute to libriscv/libriscv development by creating an account on GitHub.
2020 · github.com · its alternatives →
24
UnityPack, a Python 3 deserialization library for Unity3D files▲20
Python deserialization library for Unity3D Asset format - HearthSim/UnityPack
2016 · github.com · its alternatives →

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