Life & fun · alternatives · 2026

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. NumPy to C++14: the xtensor cheat sheet launched in 2017; newer entries below may have overtaken it.

1. 1OS
   Open-source SIMD-accelerated math library for C/C++/C#/Java/FORTRAN▲9

   2013 · yeppp.info · its alternatives →

2. 2
   I wrote an autodiff in C++ and implemented LeNet with it▲36

   2024 · gitlab.com · its alternatives →

3. 3
   Xtensor: C++14 tensor expression library with numpy-style broadcasting▲7

   C++ tensors with broadcasting and lazy computing. Contribute to xtensor-stack/xtensor development by creating an account on GitHub.

   2017 · github.com · its alternatives →

4. 4
   SyNumpy – a Header only C++17 library for working with NumPy Arrays▲22

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

   Apr 2026 · github.com · its alternatives →

5. 5
   Lightweight 2D/3D engine in D with Raylib▲8

   2022 · github.com · its alternatives →

6. 6CP
   CodeStruct – Python programming environment for novices after Scratch▲9

   2022 · code-struct.vercel.app · its alternatives →

7. 7TC
   The C++ Iceberg▲7

   2022 · fouronnes.github.io · its alternatives →

8. 8
   Python convtools library – code generation for data transforms▲8

   2020 · convtools.readthedocs.io · its alternatives →

9. 9PA
   Philip2 – an Elm-to-OCaml compiler▲8

   2019 · medium.com · its alternatives →

10. 10AS
    A small symbolic math command line using algebrite and katex▲5

    2018 · bwasti.com · its alternatives →

11. 11TA
    tut, an open platform for programming tutorials▲8

    2013 · king-tutorial.com · its alternatives →

12. 12AC
    Axiom – C++ tensor library with NumPy API and Metal GPU support▲5

    I've been building a C++ tensor library that tries to bring the ergonomics of NumPy/PyTorch to native code. The main goals were: - Familiar API (operator overloading, method chaining, same function names) - Actual GPU acceleration via Metal (not just matmul, but all ops) - Cross-platform with SIMD on x86/ARM/RISC-V via xsimd - einops-style rearrange/reduce patterns It started because I wanted NumPy's API but needed to deploy on edge devices without Python. Ended up going deeper than expected (28k LOC+) into BLAS backends, memory views, and GPU kernels. Some things I'm…

    Feb 2026 · its alternatives →

13. 13
    Yet another C SPDY implementation▲5

    2012 · github.com · its alternatives →

14. 14
    Common Lisp tutorials with OpenGL graphics▲7

    2023 · youtube.com · its alternatives →

15. 15
    NumC▲4

    The ultimate mathematics framework for modern C++.

    Jul 2026 · github.com · its alternatives →

16. 16
    Xenops: LaTeX editing with automatic asynchronous rendering in Emacs▲5

    An editing environment for LaTeX mathematical documents - dandavison/xenops

    2020 · github.com · its alternatives →

17. 17
    High-performance mathematical paradigms in Python▲7

    Improve the execution speed of pythonic paradigms.

    2018 · medium.com · its alternatives →

18. 18
    C++ Quantum Simulator written from scratch▲7

    Nov 2025 · github.com · its alternatives →

19. 19AV
    A very simple Lisp interpreter in 250 lines of literate Python▲5

    2017 · khamidou.com · its alternatives →

20. 20
    Beating GCC 12 – 118x Speedup for Jensen Shannon D. Via AVX-512FP16▲8

    SIMD-accelerated distances, dot products, matrix ops, geospatial & geometric kernels for 16 numeric types — from 6-bit floats to 64-bit complex — across x86, Arm, RISC-V, and WASM, with bindings for Python, Rust, C, C++, Swift, JS, and Go 📐 - Release Beating GCC 12 - 118x Speedup for Jensen Shannon

    2023 · github.com · its alternatives →

21. 21GA
    Guietta, a new module to quickly assemble Python GUIs▲6

    2020 · guietta.readthedocs.io · its alternatives →

22. 22CC
    Carburetta – C/C++ Fused Scanner and Parser Generator▲5

    2025 · carburetta.com · its alternatives →

23. 23
    Aphelo – A Redis-like store in C++ with Progressive Rehashing▲5

    By Pranit Garje | github.com/pranitgarje

    Apr 2026 · veniatyrannus993225.substack.com · its alternatives →

24. 24BV
    Beautiful Visualisations with the Chord Package▲6

    Beautiful Data Science

    2020 · shahinrostami.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →