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

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  • 1
    Libtirpc is a port of Suns Transport-Independent RPC library to Linux. It's being developed by the Bull GNU/Linux NFSv4 project. The upstream git tree is at: git://linux-nfs.org/~steved/libtirpc
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    Downloads: 52,821 This Week
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  • 2
    libsdl-android

    libsdl-android

    SDL library for Android, including several games.

    Port of SDL library to Android mobile platform. There are also several games inside the repository, along with their sources and build files. Both SDL 1.2 and 1.3/2.0 versions are supported (1.3/2.0 support is experimental) Sources are at https://github.com/pelya/commandergenius
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    Downloads: 4,545 This Week
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  • 3
    Check: a unit test framework for C
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    Downloads: 406 This Week
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  • 4
    IUP
    IUP is a portable toolkit for building graphical user interfaces. It offers a configuration API in three basic languages: C, Lua and LED. IUP purpose is to allow a program to be executed in different systems without any modification.
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    Downloads: 307 This Week
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  • 5
    BizHawk

    BizHawk

    BizHawk is a multi-system emulator written in C#

    A multi-system emulator written in C#. As well as quality-of-life features for casual players, it also has recording/playback and debugging tools, making it the first choice for TASers (Tool-Assisted Speedrunners). Screenshotting and recording audio + video to file. Firmware management, input, framerate, and more in a HUD over the game. Rebindable hotkeys for controlling the frontend (keyboard+mouse+gamepad). A comprehensive input mapper for the emulated gamepads and other peripherals. Programmatic control over core and frontend with Lua or C#.NET. Development builds are made automatically whenever someone contributes. Because of this, we recommend using a release for work that requires stability (such as TASing), and only switching to a dev build if there's a specific change or addition you need.
    Downloads: 62 This Week
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  • 6
    NodeMCU

    NodeMCU

    Lua based interactive firmware for ESP8266, ESP8285 and ESP32

    NodeMCU is an open source Lua-based firmware for the ESP8266 WiFi SOC from Espressif and uses an on-module flash-based SPIFFS file system. NodeMCU is implemented in C and is layered on the Espressif NON-OS SDK. The firmware was initially developed as a companion project to the popular ESP8266-based NodeMCU development modules, but the project is now community-supported, and the firmware can now be run on any ESP module.
    Downloads: 62 This Week
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  • 7
    idevicerestore

    idevicerestore

    Restore/upgrade firmware of iOS devices

    A command-line application to restore firmware files to iOS devices. The iDevice restore application is a full reimplementation of all granular steps which are performed during the restore of firmware to a device. In general, upgrades and downgrades are possible, however subject to the availability of SHSH blobs from Apple for signing the firmware files. idevicerestore requires a properly installed usbmuxd for the restore procedure. Please make sure that it is either running or configured to be started automatically as soon as a device is detected in normal and/or restore mode. If properly installed this will be handled by udev/systemd.
    Downloads: 60 This Week
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  • 8
    ESP-IDF

    ESP-IDF

    Espressif IoT Development Framework

    ESP-IDF (Espressif IoT Development Framework) is the official, open-source development framework for programming Espressif SoCs (such as ESP32, ESP32‑S2, ESP32‑C3 series). It provides toolchains, APIs, components, sample code, and workflows for building embedded IoT firmware, offering support for Wi‑Fi, Bluetooth, power management, and peripheral integration. As well as the esp-idf-template project mentioned in Getting Started, ESP-IDF comes with some example projects in the examples directory. Install host build dependencies mentioned in the Getting Started guide. Run the export script on Windows (export.bat) or source it on Unix (source export.sh) in every shell environment before using ESP-IDF.
    Downloads: 47 This Week
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  • 9
    QP Real-Time Event Frameworks & Tools

    QP Real-Time Event Frameworks & Tools

    Real-Time Event Frameworks based on active objects & state machines

    QP real-time event frameworks (RTEFs) provide lightweight, modern, event-driven architecture based on asynchronous Active Objects (Actors) and Hierarchical State Machines. The matching QM model-based design tool and other host-based tools complement the QP frameworks by supporting graphical modeling, code generation, software tracing, and unit testing for event-driven embedded software. Visit https://www.state-machine.com for more information. The QP RTEFs can run on bare-metal microcontrollers, replacing a traditional RTOS. The frameworks contain a selection of built-in real-time kernels (RTOS kernels), such as the cooperative QV kernel, the preemptive non-blocking QK kernel, and the unique preemptive, dual-mode (blocking/non-blocking) QXK kernel. Native QP ports and ready-to-use examples are provided for ARM Cortex-M (M0/M0+/M3/M4/M7/M33/...) as well as other CPUs. The QP RTEFs can also work with many traditional RTOSes and General-Purpose OSes, such as Linux and Windows.
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    Downloads: 183 This Week
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  • 10
    Darknet

    Darknet

    Convolutional Neural Networks

    Darknet is an open source neural network framework written in C and CUDA, developed by Joseph Redmon. It is best known as the original implementation of the YOLO (You Only Look Once) real-time object detection system. Darknet is lightweight, fast, and easy to compile, making it suitable for research and production use. The repository provides pre-trained models, configuration files, and tools for training custom object detection models. With GPU acceleration via CUDA and OpenCV integration, it achieves high performance in image recognition tasks. Its simplicity, combined with powerful capabilities, has made Darknet one of the most influential projects in the computer vision community.
    Downloads: 36 This Week
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  • 11
    Allows editing of any size file in hexadecimal, decimal and ASCII. A great tool that allows you to edit and analyze the contents for either the data or resource fork of any type of file. 68K, PPC and Carbon run on MacOS 7-9 and X.
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    Downloads: 211 This Week
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  • 12
    reacTIVision
    reacTIVision is a computer vision framework for the fast and robust tracking of markers attached on physical objects, and the creation of multi-touch surfaces. It was designed for the rapid development of table-based tangible user interfaces.
    Downloads: 130 This Week
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  • 13
    Radare2

    Radare2

    UNIX-like reverse engineering framework and command-line toolset

    A free/libre toolchain for easing several low-level tasks like forensics, software reverse engineering, exploiting, and debugging. It is composed by a bunch of libraries (which are extended with plugins) and programs that can be automated with almost any programming language. It is recommended to install it from git, alternatively, you can pick the last release (every 6 weeks) from Github. Batch, Commandline, visual, and panels interactive modes. Embedded webserver with js scripting and WebUI. Assemble and disassemble a large list of CPUs. Runs on Windows and any other UNIX flavor out there. Analyze and emulate code with ESIL. Native debugger and GDB, WINDBG, QNX, and FRIDA. Navigate ASCII-art control flow graphs. Ability to patch binaries, and modify code or data. Search for patterns, magic headers, and function signatures. Easy to extend and modify. Commandline, C API, script with r2pipe in any language.
    Downloads: 26 This Week
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  • 14
    waifu2x ncnn Vulkan

    waifu2x ncnn Vulkan

    waifu2x converter ncnn version, run fast GPU with vulkan

    ncnn implementation of waifu2x converter. Runs fast on Intel/AMD/Nvidia/Apple-Silicon with Vulkan API. waifu2x-ncnn-vulkan uses ncnn project as the universal neural network inference framework.
    Downloads: 12 This Week
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  • 15
    Capstone

    Capstone

    Capstone disassembly/disassembler framework

    Capstone is a disassembly framework with the target of becoming the ultimate disasm engine for binary analysis and reversing in the security community. Created by Nguyen Anh Quynh, then developed and maintained by a small community, Capstone offers some unparalleled features. Support multiple hardware architectures: ARM, ARM64 (ARMv8), Ethereum VM, M68K, Mips, MOS65XX, PPC, Sparc, SystemZ, TMS320C64X, M680X, XCore and X86 (including X86_64). Having clean/simple/lightweight/intuitive architecture-neutral API. Provide details on disassembled instruction (called “decomposer” by others). Provide semantics of the disassembled instruction, such as list of implicit registers read & written. Implemented in pure C language, with lightweight bindings for D, Clojure, F#, Common Lisp, Visual Basic, PHP, PowerShell, Emacs, Haskell, Perl, Python, Ruby, C#, NodeJS, Java, GO, C++, OCaml, Lua, Rust, Delphi, Free Pascal & Vala (ready either in main code, or provided externally by the community).
    Downloads: 9 This Week
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  • 16
    UACMe

    UACMe

    Defeating Windows user account control

    Run executable from command line, akagi32 [Key] [Param] or akagi64 [Key] [Param]. First parameter is a number of methods to use, second is an optional command (executable file name including full path) to run. The second parameter can be empty - in this case, the program will execute elevated cmd.exe from the system32 folder. Since 3.5.0 version all "fixed" methods are considered obsolete and removed altogether with all supporting code/units. If you still need them. This tool shows ONLY popular UAC bypass method used by malware, and re-implement some of them in a different way improving original concepts. There are different, not yet known to the general public, methods. This tool is not intended for AV tests and not tested to work in aggressive AV environment, if you still plan to use it with installed bloatware AV soft, use it at your own risk.
    Downloads: 7 This Week
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  • 17
    Unicorn Engine

    Unicorn Engine

    Unicorn CPU emulator framework (ARM, AArch64, M68K, Mips, Sparc

    Unicorn is a lightweight multi-platform, multi-architecture CPU emulator framework. Highlight features. Multi-architectures: ARM, ARM64 (ARMv8), m68k, MIPS, PowerPC, RISC-V, S390x (SystemZ), SPARC, TriCore & x86 (include x86_64). Clean/simple/lightweight/intuitive architecture-neutral API. Implemented in pure C language, with bindings for Pharo, Crystal, Clojure, Visual Basic, Perl, Rust, Haskell, Ruby, Python, Java, Go, D, Lua, JavaScript, .NET, Delphi/Pascal & MSVC available. Native support for Windows & *nix (with macOS, Linux, Android, *BSD & Solaris confirmed). High performance by using the Just-In-Time compiler technique. Support fine-grained instrumentation at various levels. Thread-safe by design. Distributed under free software license GPLv2. Another significant change on this version is the addition of some new APIs to allow better control on how the core engine works.
    Downloads: 7 This Week
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  • 18
    Themis

    Themis

    Easy to use cryptographic framework for data protection

    Cross-platform high-level cryptographic library. Themis helps to build simple and complex cryptographic features easily, quickly, and securely. It’s a perfect fit for multi-platform apps. Themis hides cryptographic details and eliminates popular mistakes. Themis provides ready-made building blocks (“cryptosystems”) for secure data storage, message exchange, socket connections, and authentication. Secure Cell is a multi-mode cryptographic container suitable for storing anything from encrypted files to database records. Use Secure Cell to encrypt data at rest. Secure Cell is built around AES-256-GCM, and AES-256-CTR. Secure Message is a simple encrypted messaging solution for the widest scope of applications. Use Secure Message to send encrypted and signed data from one user to another, from client to server, to prevent MITM attacks and avoid single secret leakage. Based on ECC + ECDSA / RSA + PSS + PKCS#7.
    Downloads: 6 This Week
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  • 19
    SW Test Automation Framework
    The Software Testing Automation Framework (STAF) is a framework designed to improve the level of reuse and automation in test cases and test environments. The goal of STAF is to provide a complete end-to-end automation solution for testers.
    Downloads: 23 This Week
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  • 20
    wxLua
    wxLua is a Lua scripting language wrapper for the wxWidgets cross-platform GUI library. It consists of executables for editing, running, and debugging wxLua scripts, a library for extending C++ programs with a fast, small, fully embeddable scripting language, and a variety of sample programs. With wxLua you can quickly write full-featured programs with graphics, networking, printing, etc. for MS Windows, Linux, and OSX.
    Downloads: 28 This Week
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  • 21
    LCUI

    LCUI

    A small C library for building user interfaces with C, XML and CSS

    Build simple desktop apps with C, XML and CSS. LCUI is a simple GUI library, it is written in C, supports XML and CSS, you can use C, XML and CSS to build simple desktop applications, at present it is mainly supported by Windows, subsequent versions will improve support for Linux. If you have web development experience, then the use of LCUI will be easier to get started, because LCUI's XML, CSS, and element layout processing effects are similar to web browser, you can refer to the sample code on the left to learn about the effect. Supports the use of XML and CSS to describe the GUI layout and style, saving interface development time and maintenance costs. Support for Windows and Linux, you can write Windows Desktop apps and Universal Windows Platform apps, as well as Linux Desktop apps. To get started with LCUI, you can using lcui-cli to create an LCUI project, then compile and run it.
    Downloads: 4 This Week
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  • 22
    Open source and free library in 'C' programming language for work with NMEA protocol. Small and easy to use. The library build on different compilers under different platforms (see below). The code was tested in real projects. Just download and try...
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    Downloads: 22 This Week
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  • 23
    Criterion

    Criterion

    A cross-platform C and C++ unit testing framework for the 21st century

    Most test frameworks for C require a lot of boilerplate code to set up tests and test suites -- you need to create a main, then register new test suites, then register the tests within these suites, and finally call the right functions. This gives the user great control, at the unfortunate cost of simplicity. Criterion follows the KISS principle, while keeping the control the user would have with other frameworks. Supports parameterized tests and theories. Progress and statistics can be followed in real time with report hooks. TAP output format can be enabled with an option. Runs on Linux, FreeBSD, macOS, and Windows (Compiling with MinGW GCC and Visual Studio 2015+). If you'd like to see Criterion included in your favorite distribution, please reach out to their package maintainers team. A default entry point is provided, no need to declare a main unless you want to do special handling.
    Downloads: 3 This Week
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  • 24
    Inspektor Gadget

    Inspektor Gadget

    The eBPF tool and systems inspection framework for Kubernetes

    Inspektor Gadget is a collection of tools (or gadgets) to debug and inspect Kubernetes resources and applications. It manages the packaging, deployment, and execution of eBPF programs in a Kubernetes cluster, including many based on BCC tools, as well as some developed specifically for use in Inspektor Gadget. It automatically maps low-level kernel primitives to high-level Kubernetes resources, making it easier and quicker to find the relevant information.
    Downloads: 3 This Week
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  • 25
    LuatOS

    LuatOS

    Powerful embedded Lua Engine for IoT devices, with many components

    Powerful embedded Lua Engine for IoT devices, with many components and low memory requirements (16K RAM, 128K Flash).
    Downloads: 3 This Week
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