Dev tools · alternatives · 2026

24 alternatives to libsrt – fast C library with heap and stack allocation

libsrt is a C library for writing fast and safe C code, faster. It provides string, vector, bit set, set, map, hash set, and hash map handling. Suitable for soft and hard real-time. Allows both heap and stack allocation. *BETA* (API still can change: suggestions are welcome) - faragon/libsrt

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. libsrt – fast C library with heap and stack allocation launched in 2015; newer entries below may have overtaken it.

1. 1
   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 →

2. 2LA
   Libcox – A C Library for Cross-Platform System Calls▲47

   2015 · libcox.net · its alternatives →

3. 3
   A portable hash map in C▲176

   A small, portable, linear probing hash map. Contribute to e-dant/salmagundi development by creating an account on GitHub.

   2024 · github.com · its alternatives →

4. 4
   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 →

5. 5
   Smart pointers for the C programming language▲126

   Smart pointers for the (GNU) C programming language - Snaipe/libcsptr

   2015 · github.com · its alternatives →

6. 6
   I built a web framework in C▲420

   a lightweight web framework in c. Contribute to ashtonjamesd/lavandula development by creating an account on GitHub.

   2025 · github.com · its alternatives →

7. 7
   A pure C89 implementation of Go channels, with blocking selects▲271

   A pure C (-std=c89) implementation of Go channels, including blocking and non-blocking selects. - GitHub - rochus-keller/CspChan: A pure C (-std=c89) implementation of Go channels, including blocking and non-blocking selects.

   2023 · github.com · its alternatives →

8. 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. 9
   Libconcurrent – Coroutines in C▲91

   :copyright: Concurrent Programming Library (Coroutine) for C11 - sharow/libconcurrent

   2016 · github.com · its alternatives →

10. 10
    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 →

11. 11LT
    Libquiet – transmit data using sound▲127

    2016 · brian-armstrong.github.io · its alternatives →

12. 12
    Chan – pure C implementation of Go channels▲150

    Pure C implementation of Go channels. Contribute to tylertreat/chan development by creating an account on GitHub.

    2014 · github.com · its alternatives →

13. 13
    TG – Fast geometry library for C▲201

    Geometry library for C - Fast point-in-polygon. Contribute to tidwall/tg development by creating an account on GitHub.

    2023 · github.com · its alternatives →

14. 14
    A 166 KB file for cross compiling glibc for any version, any target▲171

    A repository that collects libc ABI files for multiple versions and a tool to combine them into one dataset. - ziglang/libc-abi-tools

    2021 · github.com · its alternatives →

15. 15
    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 →

16. 16
    Fast integer compression library in C▲45

    A very fast scalar implementation for Frame Of Reference integer compression. - cruppstahl/libfor

    2015 · github.com · its alternatives →

17. 17
    T2b – A wicked-powerful text macro language for building binary files▲117

    A wicked-powerful text macro language for building binary files. - thosakwe/t2b

    2018 · github.com · its alternatives →

18. 18
    Neco – Coroutine Library for C▲145

    Concurrency library for C (coroutines). Contribute to tidwall/neco development by creating an account on GitHub.

    2024 · github.com · its alternatives →

19. 19CL
    C library of generic, reference-counted data structures▲91

    2013 · theck01.github.io · its alternatives →

20. 20
    C library for Linux to easily create modular projects▲56

    C simple and elegant implementation of an actor library - GitHub - FedeDP/libmodule: C simple and elegant implementation of an actor library

    2018 · github.com · its alternatives →

21. 21HA
    Hsdlib – A C Library for Vector Similarity with SIMD Acceleration▲38

    Hsdlib is a small C library for fast vector distance and similarity calculations. At the moment, it supports: - Euclidean, Manhattan, and Hamming distances - Dot product, cosine, and Jaccard similarities Hsdlib uses SIMD acceleration (AVX, AVX2, AVX512, NEON, and SVE instructions) to speed things up. GitHub link: https://github.com/habedi/hsdlib

    2025 · its alternatives →

22. 22SA
    Spart – A Rust library for fast spatial search with Python bindings▲31

    Hi everyone, I've made an open-source library for fast spatial search in Rust. It's called Spart, and it currently provides the following features: - Five tree implementations: Quadtree, Octree, Kd-tree, R-tree, and R*-tree - Python bindings (`pyspart` on PyPI) - Fast k-nearest neighbor (kNN) and radius search - Bulk data loading for efficient tree construction Project's GitHub repo: https://github.com/habedi/spart

    2025 · its alternatives →

23. 23
    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 →

24. 24
    Kent Dybvig's Scheme Machine in 400 Lines of C (Heap-Memory Model)▲226

    Heap based scheme machine. GitHub Gist: instantly share code, notes, and snippets.

    2025 · gist.github.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 →