C Algorithm

Open-source C projects categorized as Algorithm
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Top 18 C Algorithm Projects

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Algorithm

  1. tbox

    🎁 A glib-like multi-platform c library

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  3. Klib

    A standalone and lightweight C library

    Project mention: It's Alive! statgrab Returns After 20 Years | dev.to | 2026-04-28

    I shipped a 1.0.0 modernization this week. Rebuilt the storage on top of klib khash, got it green on PHP 7.4 through 8.5 NTS and ZTS, added a proper OO surface (LcHash with $obj[$key] dimension access), wrote a benchmark script and let it run.

  4. sc

    Common libraries and data structures for C.

  5. quadsort

    Quadsort is a branchless stable adaptive mergesort faster than quicksort.

  6. blitsort

    Blitsort is an in-place stable adaptive rotate mergesort / quicksort.

  7. scrypt

    The scrypt key derivation function was originally developed for use in the Tarsnap online backup system and is designed to be far more secure against hardware brute-force attacks than alternative functions such as PBKDF2 or bcrypt.

  8. sha-2

    SHA-2 algorithm implementations (by amosnier)

  9. SaaSHub

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  10. cgranges

    A C/C++ library for fast interval overlap queries (with a "bedtools coverage" example)

  11. fast_zlib

    Heavily optimized zlib compression algorithm

  12. dslib

    :herb: A library of "connected" data structures

  13. utf8

    Fast UTF-8 validation with range algorithm (NEON+SSE4+AVX2) (by cyb70289)

  14. rhsort

    Robin Hood Sort, for uniform data

  15. air-ctl

    C Language Template Library C语言 模板库

  16. Veracrypt-Password-Extractor

    A proof-of-concept DLL that prints out the password a user enters into Veracrypt while decrypting a volume.

  17. arduino-gas-index-algorithm

    Arduino Library for Sensirion's Gas Index Algorithm, providing a VOC and NOx Index output signal calculated from the SGP40/41 raw signals

  18. libaca

    C Library of Aho-Corasick Algorithm based on Coordinate Hash Trie

  19. PoxHash

    A block hashing algorithm with implementations in C, Rust, Go, Nim, Python and JS

  20. HSL

    HSL to RGB and RGB to HSL

  21. SaaSHub

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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 Algorithm discussion

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  • [Offer] I am a systems, network, and SciComp programmer, I am looking for small, short gigs to fund my libre projects. I have a good portfolio, and I have adequate grasp of theory. My prices begin at $5 and end at $60 for small, one-time gigs. C, x86-64|Aarch64 Assembly, Go, Python, Shell Scripting

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Index

What are some of the best open-source Algorithm projects in C? This list will help you:

# Project Stars
1 tbox 5,121
2 Klib 4,731
3 sc 2,571
4 quadsort 2,200
5 blitsort 713
6 scrypt 519
7 sha-2 201
8 cgranges 171
9 fast_zlib 146
10 dslib 131
11 utf8 85
12 rhsort 79
13 air-ctl 35
14 Veracrypt-Password-Extractor 15
15 arduino-gas-index-algorithm 12
16 libaca 11
17 PoxHash 8
18 HSL 3

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