Open Source C Software - Page 8

C Software

C Clear Filters

Browse free open source C Software and projects below. Use the toggles on the left to filter open source C Software by OS, license, language, programming language, and project status.

  • Forever Free Full-Stack Observability | Grafana Cloud Icon
    Forever Free Full-Stack Observability | Grafana Cloud

    Our generous forever free tier includes the full platform, including the AI Assistant, for 3 users with 10k metrics, 50GB logs, and 50GB traces.

    Built on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
    Create free account
  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build, govern, and optimize agents and models with Gemini Enterprise Agent Platform.
    Start Free
  • 1
    Scid vs. PC

    Scid vs. PC

    Chess Database and Toolkit program

    "Shane's Chess Information Database" is a huge chess toolkit with extensive database, analysis and chess-playing features. Scid vs. PC is a usability and bug-fix fork of Scid. It has many interface fixes and improvements, and is fully compatible with Scid's .si4 databases. New features include a rewritten Gamelist, Computer Tournament, and FICS, Tree, Book and Graph improvements.
    Leader badge
    Downloads: 709 This Week
    Last Update:
    See Project
  • 2
    Freeware Advanced Audio Codec
    FAAC is an Advanced Audio Coder (MPEG2-AAC, MPEG4-AAC). The goal of FAAC is to explore the possibilities of AAC and exceed the quality of the currently best MP3 encoders. You can submit pull requests via GitHub: https://github.com/knik0/faac https://github.com/knik0/faad2
    Leader badge
    Downloads: 831 This Week
    Last Update:
    See Project
  • 3
    RHash
    RHash (Recursive Hasher) is a console utility for computing and verifying hash sums of files. It supports CRC32, CRC32C, MD4, MD5, SHA1, SHA256, SHA512, SHA3, AICH, ED2K, DC++ TTH, BTIH, Tiger, GOST R 34.11-2012, RIPEMD-160, HAS-160, EDON-R, and Whirlpool.
    Leader badge
    Downloads: 970 This Week
    Last Update:
    See Project
  • 4
    BlackHole

    BlackHole

    BlackHole is a modern macOS audio loopback driver

    BlackHole is a modern virtual audio loopback driver for macOS that allows audio to be routed between applications with zero additional latency. It is widely used by musicians, streamers, developers, and audio engineers who need reliable internal audio routing without external hardware. BlackHole supports a wide range of sample rates and configurable channel counts, making it flexible for both simple and advanced audio workflows. The driver integrates directly with macOS Core Audio and appears in Audio MIDI Setup and supported audio applications. Designed with performance and stability in mind, BlackHole works on both Intel and Apple Silicon Macs without requiring kernel extensions or system security modifications. As an open-source project, it offers transparency, customization options, and active community-driven development.
    Downloads: 157 This Week
    Last Update:
    See Project
  • Compliant and Reliable File Transfers Backed by Top Security Certifications Icon
    Compliant and Reliable File Transfers Backed by Top Security Certifications

    Cerberus FTP Server delivers SOC 2 Type II certified security and FIPS 140-2 validated encryption.

    Stop relying on non-certified, legacy file transfer tools that creak under the weight of modern security demands. Get full audit trails, advanced access controls and more supported by an award-winning team of experts. Start your free 25-day trial today.
    Start Free Trial
  • 5
    SwiftShader

    SwiftShader

    SwiftShader is a high-performance CPU-based implementation

    SwiftShader is Google’s high-performance CPU-based implementation of the Vulkan 1.3 graphics API, designed to provide a hardware-independent rendering solution for 3D graphics. Unlike traditional GPU drivers, SwiftShader executes graphics commands entirely on the CPU, making it ideal for environments where dedicated graphics hardware is unavailable or unsuitable. It acts as a drop-in replacement for Vulkan drivers, allowing existing applications to run seamlessly by redirecting API calls through its software-based rendering engine. The project supports Windows, Linux, macOS, Android, and ChromeOS, offering broad cross-platform compatibility. SwiftShader’s design emphasizes both performance and compliance, enabling robust software rendering for testing, virtualization, and cloud-based graphics workloads.
    Downloads: 155 This Week
    Last Update:
    See Project
  • 6
    mcrypt, and the accompanying libmcrypt, are intended to be replacements for the old Unix crypt, except that they are under the GPL and support an ever-wider range of algorithms and modes.
    Leader badge
    Downloads: 729 This Week
    Last Update:
    See Project
  • 7

    psmisc

    Old location for psmisc

    Please visit us at https://gitlab.com/psmisc/psmisc
    Leader badge
    Downloads: 1,402 This Week
    Last Update:
    See Project
  • 8
    TCP/IP-Network extension for the PLC simulation software Siemens PLCSim (Step 7 V5.4/5.5). With NetToPLCSim you are able to simulate e.g. SCADA systems over Network in combination with your simulated PLC.
    Leader badge
    Downloads: 703 This Week
    Last Update:
    See Project
  • 9
    hekate

    hekate

    A GUI based Nintendo Switch Bootloader

    hekate is a custom graphical bootloader for the Nintendo Switch that enables advanced system control, firmware patching, and multi-environment boot management for both official and custom operating systems. It functions as a powerful entry point for launching different firmware configurations, including stock firmware, custom firmware, Linux distributions, and Android builds, all from a unified interface. The bootloader features a touchscreen-enabled graphical user interface called Nyx, allowing users to navigate options, manage configurations, and execute tools directly from the device. It provides advanced storage management capabilities such as backing up and restoring eMMC data, managing emulated NAND environments, and partitioning SD cards for multiple operating systems. hekate also includes utilities for hardware diagnostics, benchmarking, and system inspection, offering detailed insights into device components like memory, battery, and storage.
    Downloads: 148 This Week
    Last Update:
    See Project
  • AI-powered service management for IT and enterprise teams Icon
    AI-powered service management for IT and enterprise teams

    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity. Maximize operational efficiency with refreshingly simple, AI-powered Freshservice.
    Try it Free
  • 10
    FormatUsb

    FormatUsb

    The FormatUsb tool is a reliable way to format USB flash drives

    The FormatUsb tool is a reliable way to format USB flash drives, such as USB keys/pendrives, memory sticks,SD Memory Card, SDHC Memory Card and SDXC Memory Card SD/SDHC/SDXC Cards.
    Downloads: 147 This Week
    Last Update:
    See Project
  • 11
    This project is a random collection of Linux kernel-related projects and source code.
    Leader badge
    Downloads: 894 This Week
    Last Update:
    See Project
  • 12
    Fast Mouse Clicker
    A tool that clicks the mouse extremely quickly. Using keyboard keys (or mouse buttons) as the trigger, you can position the mouse, then hit a key to click up to 9999 times every second.
    Leader badge
    Downloads: 1,042 This Week
    Last Update:
    See Project
  • 13
    LXDE - Lightweight X11 Desktop Environment. This project aimed to provide a new desktop environment which is useful enough and keep resource usage lower at the same time. Useabiliy, speed, and memory usage are our main concern. Suitable for netbooks.
    Leader badge
    Downloads: 677 This Week
    Last Update:
    See Project
  • 14
    QB64

    QB64

    BASIC for the modern era

    QB64 is a modern self-hosting BASIC compiler that brings classic QBasic/QuickBASIC programs into the modern era. It enables legacy code to run on today’s operating systems with minimal modifications, while also introducing new commands and libraries for multimedia, networking, and 64-bit computing. QB64 compiles to C++ and includes a built-in IDE, making it accessible for beginners, hobbyists, and retro programming enthusiasts. It aims to preserve the ease and nostalgia of BASIC while expanding its capabilities for contemporary development.
    Downloads: 136 This Week
    Last Update:
    See Project
  • 15
    Freeciv
    Freeciv is a free turn-based multiplayer strategy game, in which each player becomes the leader of a civilization, fighting to obtain the ultimate goal: to become (or subvert) the greatest civilization.
    Leader badge
    Downloads: 603 This Week
    Last Update:
    See Project
  • 16

    Linux Test Project

    Testsuite to validate the reliability, robustness, stability of Linux.

    Linux Test Project (LTP) is a joint project started by SGI, OSDL and Bull developed and maintained by SUSE, Red Hat, Fujitsu, IBM, Cisco, Oracle and others. The project goal is to deliver tests to the open source community that validate reliability, robustness, and stability of the Linux Kernel. The testing suites contain a collection of tools for testing the Linux kernel and related features. Our goal is to improve the Linux kernel and system libraries by bringing test automation.
    Leader badge
    Downloads: 980 This Week
    Last Update:
    See Project
  • 17
    OpenCorePkg

    OpenCorePkg

    OpenCore bootloader

    OpenCorePkg is an open-source, modular UEFI (Unified Extensible Firmware Interface) bootloader and development framework, primarily designed to enable macOS booting on non-Apple hardware (Hackintosh). It includes Apple-specific UEFI drivers, utilities for macOS installation support, and shared libraries used across Acidanthera projects. Apple disk image loading support. Apple keyboard input aggregation. Apple PE image signature verification. Apple UEFI secure boot supplemental code. Audio management with screen reading support. Basic ACPI and SMBIOS manipulation.
    Downloads: 128 This Week
    Last Update:
    See Project
  • 18
    REKCARC-TSC-UHT

    REKCARC-TSC-UHT

    Guidance for courses in Department of Computer Science and Technology

    This repository is a mirrored, community-curated set of study materials for Tsinghua University’s Department of Computer Science and Technology (the name reads like “THU-CST” reversed). It gathers course notes, labs, exam archives, and project write-ups across core CS topics, emphasizing reproducible setups and guidance for succeeding in demanding classes. The content is organized to mirror the program’s progression so students can see prerequisites and plan learning paths. Contributors document pitfalls and tips that official syllabi may not cover, such as tooling quirks or typical grading criteria. The project stresses responsible use—learn from the material, don’t plagiarize—and continually evolves through community review. As a living handbook, it captures institutional knowledge that helps level the playing field for students with different backgrounds.
    Downloads: 128 This Week
    Last Update:
    See Project
  • 19
    s3cmd

    s3cmd

    Command line tool for managing Amazon S3 and CloudFront services

    Open-source tool to access Amazon S3 file storage. S3cmd is a free command line tool and client for uploading, retrieving and managing data in Amazon S3 and other cloud storage service providers that use the S3 protocol, such as Google Cloud Storage. Lots of features and options have been added to s3cmd since its very first release in 2008.... we recently counted more than 60 command line options, including multipart uploads, encryption, incremental backup, s3 sync, ACL and Metadata management, S3 bucket size, bucket policies, and more!
    Leader badge
    Downloads: 853 This Week
    Last Update:
    See Project
  • 20
    AppSync

    AppSync

    Unified AppSync dynamic library for iOS 5 and above

    AppSync is a tool that enables sideloading and installation of unsigned iOS applications. It allows developers and users to install apps without requiring a paid Apple Developer account.
    Downloads: 127 This Week
    Last Update:
    See Project
  • 21
    WinAVR
    WinAVR (tm) is a suite of executable, open source software development tools for the Atmel AVR series of RISC microprocessors hosted on the Windows platform. Includes the GNU GCC compiler for C and C++.
    Leader badge
    Downloads: 736 This Week
    Last Update:
    See Project
  • 22
    pdfcrack is a command line, password recovery tool for PDF-files.
    Leader badge
    Downloads: 627 This Week
    Last Update:
    See Project
  • 23
    Arduino core for the ESP32

    Arduino core for the ESP32

    Arduino core for the ESP32

    ESP32 is a single 2.4 GHz Wi-Fi-and-Bluetooth SoC (System On a Chip) designed by Espressif Systems. ESP32 is designed for mobile, wearable electronics, and Internet-of-Things (IoT) applications. It features all the state-of-the-art characteristics of low-power chips, including fine-grained clock gating, multiple power modes,and dynamic power scaling. For instance, in a low-power IoT sensor hub application scenario, ESP32 is woken-up periodically and only when a specified condition is detected. The low-duty cycle is used to minimize the amount of energy that the chip expends. The output of the power amplifier is also adjustable, thus contributing to an optimal trade-off between communication range, data rate and power consumption. The ESP32 series is available as a chip or module. You can use Arduino-ESP32 Online Documentation to get all information about this project.
    Downloads: 122 This Week
    Last Update:
    See Project
  • 24
    Re2c is a tool for writing very fast and very flexible scanners. Unlike any other such tool, re2c focuses on generating high efficient code for regular expression matching. As a result this allows a much broader range of use than any traditional lexer.
    Leader badge
    Downloads: 602 This Week
    Last Update:
    See Project
  • 25
    QRes provides automatic screen mode change for Windows applications. For instance, you can make QRes switch to 800 x 600 @ 256 colors as long as you run a game and switch back to your regular screen mode when it is over. Win32 app written in C/C++.
    Leader badge
    Downloads: 918 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB