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Starred repositories

44 stars written in C
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build-once run-anywhere c library

C 20,780 738 Updated Mar 6, 2026

darktable is an open source photography workflow application and raw developer

C 12,325 1,307 Updated Apr 28, 2026

GnuCash Double-Entry Accounting Program.

C 4,211 940 Updated Apr 26, 2026

Slurm: A Highly Scalable Workload Manager

C 3,938 825 Updated Apr 28, 2026

BLAS-like Library Instantiation Software Framework

C 2,633 417 Updated Nov 11, 2025

Roaring bitmaps in C (and C++), with SIMD (AVX2, AVX-512 and NEON) optimizations: used by Apache Doris, ClickHouse, Alibaba Tair, Redpanda, YDB and StarRocks

C 1,815 314 Updated Apr 28, 2026

Repository for stand-alone RTL8188EU driver.

C 1,753 605 Updated Apr 14, 2024

Open-source foundation of the user-sponsored PyMOL molecular visualization system.

C 1,663 373 Updated Mar 25, 2026

Parallel solvers for sparse linear systems featuring multigrid methods.

C 834 245 Updated Apr 28, 2026

Open Fabric Interfaces

C 783 492 Updated Apr 28, 2026

Collection of miscellaneous portable C snippets.

C 755 74 Updated Jan 16, 2024

libLBFGS: a library of Limited-memory Broyden-Fletcher-Goldfarb-Shanno (L-BFGS)

C 593 197 Updated Jun 22, 2023

C library for finding and handling crystal symmetries

C 360 123 Updated Dec 28, 2025

A program for timing mechanical watches

C 322 79 Updated Jun 20, 2023

Information about many aspects of high-performance computing. Wiki content moved to ~/docs.

C 313 60 Updated Dec 16, 2025

general GTO integrals for quantum chemistry

C 245 93 Updated Nov 16, 2025

Distributed memory, MPI based SuperLU

C 220 80 Updated Apr 27, 2026

QUICK: A GPU-enabled ab intio quantum chemistry software package

C 204 52 Updated Apr 28, 2026

Partitioned Global Address Space (PGAS) library for distributed arrays

C 113 41 Updated Apr 21, 2026

Wrapper interface for MPI

C 99 18 Updated Apr 1, 2026

Simulation Package for Ab-initio Real-space Calculations

C 96 45 Updated Apr 9, 2026

molecular point group symmetry lib

C 89 36 Updated Aug 20, 2024

TREX I/O library

C 67 22 Updated Apr 27, 2026

Quantum Monte Carlo Kernel Library

C 40 16 Updated Mar 24, 2026

Code generator for simint vectorized integrals

C 29 10 Updated Mar 16, 2023

MolSSI Integral Reference Project

C 29 4 Updated Feb 27, 2021

A C++ library for evaluating non-orthogonal matrix elements in electronic structure

C 28 7 Updated Feb 19, 2025

Yet Another extended Hueckel Molecular Orbital Package

C 28 16 Updated Mar 6, 2026

Wave-function analysis tool library

C 27 5 Updated Mar 29, 2026

A place to store information for the tensor discussions and possible specifications.

C 24 6 Updated Jul 2, 2025
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