Open Source C Software - Page 54
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C Software
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.
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A series of open source files and programs available to use for developing programs to work with the WowWee Robotics RSMedia Robot. These include a USB serial console, a cross-compiler, a firmware dump program, text-to-speech and source code.
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transmission-daemon-cygwin
Transmission bittorrent with p2p streaming. Fast, stable, feature rich
Feb. 7, 2019 Transmission is a respected Fast, Easy, and Free BitTorrent Client, as from their site https://transmissionbt.com/about Unofficial Windows build runs perfect either Windows service or daemon. 32 bit and 64 bit versions. 32 (runs everywhere), 64 only 64-bit Windows. Decision made to maintain choice 2.7x core rather than somewhat buggy 2.8x-2.9x cores. That's why you will see infrequent and less bug fixes than official branches. All the features of 2.8x-2.9x (except rename). Run this solid 2.77+ port for extended days, it doesn't crash or lock. Prime for seedbox use. The included remote GUI port is fine tuned to the daemon released here. Temporary piece support. https://trac.transmissionbt.com/ticket/532 plus many featured enhancements! Tested, stable enhancements users requested. Specifically modified and bug tested for Linux GCC and Windows (cygwin gcc/g++) compilers. Current release 14734-18 020619 https://github.com/cfpp2p/transmission/releases -
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Fully Managed MySQL, PostgreSQL, and SQL ServerCloud SQL handles your database ops end to end, so you can focus on your app.
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Graphics primitives (line, circle, rectangle etc.) with AA support, rotozoomer and other drawing related support functions wrapped up in a C based add-on library for the Simple Direct Media (SDL) cross-platform API layer.
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Virtual PC Simulator
VPCS
The VPCS can simulate up to 9 PCs. You can ping/traceroute them, or ping/traceroute the other hosts/routers from the virtual PCs when you study the Cisco routers in the Dynamips. VPCS is not the traditional PC, it is just a program running on the Linux or Windows, and only few network commands can be used in it. But VPCS can give you a big hand when you study the Cisco devices in the Dynamips. VPCS can replace the routers or VMware boxes which are used as PCs in the Dynamips network. -
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240p-test-suite
A homebrew video suite for game consoles
Downloads are now available at https://artemiourbina.itch.io/240p-test-suite A homebrew software suite for video game consoles developed to help in the evaluation of upscalers, upscan converters, line doublers and of course TV processing of 240p video. The Wii and Dreamcast versions have modes for 480i and 480p evaluation as well. It has tests designed with the processing of 240p signals in mind, although when possible it includes other video modes and specific tests for them. These have been tested with video processors on real hardware and a variety of displays, including CRTs and Arcade monitors via RGB. As a secondary target, the suite aims to provide tools for calibrating colors, black and white levels for specific console outputs and setups. Current platforms are: Sega Genesis (Mega Drive), Sega CD (Mega CD), PC Engine/Turbografx-16, Super CD-ROM2/CD-ROM2, NES/Famicom, Super Nintendo/Super Famicom, Sega Dreamcast, Nintendo Wii and GameCube. -
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Molecular Dynamics Studio
Molecular Dynamics Cell Construction
This is a collection of software modifications created to integrate NanoEngineer-1, PACKMOL and MSI2LMP for the purpose of easily creating molecular dynamics cells. NanoEngineer-1 is a molecular CAD software written by Nanorex and provides the user an easy way to create molecules, while the software modifications allow the user to type atoms using multiple force fields. PACKMOL can generate a random collection of molecules using the molecule templates from NanoEngineer-1 thus providing the initial MD cell. Modifications to PACKMOL allow the atom type data to be passed through to the MSI2LMP software. MSI2LMP creates a LAMMPS input file based on class I or class II force fields. MSI2LMP was modified to use numerically coded force field data generated by NanoEngineer-1. The MMP file format was extended and integrated into all three software applications. http://www.nanoengineer-1.net http://www.ime.unicamp.br/~martinez/packmol/ http://lammps.sandia.gov/ -
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Z88 Development Kit
C compiler and dev kit for the z80 with assembly language libraries.
Z88DK is a complete Z80 / Z180 development kit that includes C compiler, assembler, linker, a tool for generating executables in a number of formats, and miscellaneous other tools. Over 80 machines are directly supported out of the box including standalone Z80 and Z180 embedded systems. Z88DK's extensive assembly language libraries give it significant performance advantages over other Z80 C Compilers. Building software for standalone or generic Z80 systems: https://www.z88dk.org/wiki/doku.php?id=libnew:target_embedded Visit us at github for the current version with bugfixes and new features: https://github.com/z88dk/z88dk -
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EN: Code created to show how is done the calculation of a CRC. It includes many different CRCs to choose from. This software was created to help people understand how is the CRC calculated and be able to see it in a practical way, it is also available to copy and use it for your own project. I hope it helps you. ES: Código creado para mostrar como se realiza el cálculo de un CRC. Con el mismo se incluyen varios CRCs que pueden ser escogidos. Este software se creó con el propósito de ayudar a la gente a entender como se hace el cálculo de un CRC de una manera más práctica y sencilla, también se puede copiar y aprovecharlo para otras aplicaciones. Espero que te sea util.
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International Components for Unicode
Open Source C/C++/Java libraries from Unicode
This project has moved! See the ICU website: https://icu.unicode.org/ ICU code is here: https://github.com/unicode-org/icu ICU from Unicode is a mature, widely used set of portable C/C++ and Java libraries for Unicode support, software internationalization and globalization (i18n/g11n). -
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MPD
Music Player Daemon SACD/DVD-A ISO decoder plugins
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xlsLib
C++/C library to construct Excel .xls files in code.
A multiplatform C++ library for dynamic generation of Excel .xls files containing multiple worksheets. Unlike .csv files, these can be directly opened by Excel and thus provide an excellent way to output large data sets that require further analysis. To see the latest changes, select "Files" and view the README text displayed at the bottom of that pane. IMPORTANT: Major changes are contained in the current SVN source. If you have time please try to use it or the xlslib-package-2.4.0b1.zip archive, and enter bug reports on any problems! Changes: - library specific strings now in their own namespace - iOS Objective-C library - most project files updated (MSVS etc) - C bridge now supports formulas Note: there is a related SF project, libxls, to read Excel files. -
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9cc C compiler
A Small C Compiler
9cc is a small and educational C compiler designed to demonstrate the internal workings of a compiler while still being capable of compiling meaningful programs. It serves as a continuation of Rui Ueyama’s series of compiler projects, focusing on clarity and incremental development rather than production-level optimization. The compiler implements essential stages such as lexical analysis, parsing, semantic analysis, and code generation, providing a complete pipeline from source code to executable output. It supports a subset of the C language sufficient to understand real-world compilation concepts, making it a valuable learning resource for developers interested in low-level programming. The project emphasizes readability and simplicity, with code structured to be easily understood rather than highly optimized. It also demonstrates key compiler design principles such as abstract syntax trees and symbol tables. -
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Cloudberry
One advanced and mature open-source MPP
Apache Cloudberry is a distributed real-time analytics engine designed for querying massive social media datasets. It integrates with Apache AsterixDB and supports efficient ad-hoc queries and aggregations across large volumes of data. Cloudberry is especially useful for dashboards, trend analysis, and time-series social data exploration. -
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CoolPotOS
CoolPotOS for ia32 / amd64
CoolPotOS is a small, hobbyist operating system designed to be minimal and educational, offering the most basic kernel capabilities while remaining accessible to beginners. Written in C and Assembly, it focuses on bootstrapping, kernel entry, and simple console output. Though in early stages, CoolPotOS showcases the boot process, memory segmentation, and essential CPU features, serving as a great learning resource for those new to operating system internals. -
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Guitar
Git GUI Client
Many Git client apps have some problems. It's too late to start up, falls well, is user registration tedious when downloading, is paid for commercial use, is not multi-platform, or is an animation or visual effect. It was said that the production was overkill and the wizard and the source code were not published. I tried to eliminate such inconvenience as much as possible. At first I started developing it for my own study, because I was interested in learning how to use Git and how it worked inside. Some of the best engineers of the time may think Git in GUI. That's a lot of it. When I want to execute a command that I rarely use, I sometimes force myself to do not rely on the GUI, open the terminal and hand enter the git command. If you find a feature that you find useful, you can incorporate it into this app. You can use it comfortably for daily use of Git operations, want to see the commit graphs cleanly, or just for such uses. -
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HSTR
bash and zsh shell history suggest box
Easily view, navigate and search your command history with shell history suggest box for bash and zsh. Are you looking for a command that you used recently? Do you want to avoid the need to write long commands over and over again? Are you looking for a tool that is able to manage your favorite commands? HSTR (HiSToRy) is a command-line utility that brings improved bash/zsh command completion from history. It aims to make completion easier and more efficient than Ctrl-r. HSTR can also manage your command history (for instance you can remove commands that are obsolete or contain a piece of sensitive information) or bookmark your favorite commands. -
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HypoPG
Hypothetical Indexes for PostgreSQL
HypoPG is a PostgreSQL extension that allows you to create hypothetical indexes without actually building them on disk. It helps developers and DBAs test the impact of potential indexes on query performance before committing resources. By simulating indexes, HypoPG assists in query optimization and index strategy planning without any performance or storage cost. -
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Lunar
Intelligent adaptive brightness and monitor control app for macOS
Lunar is a macOS-focused application designed to improve control over external monitors by intelligently adjusting brightness and other display settings. Instead of applying a software brightness overlay, it directly communicates with compatible displays using the DDC/CI hardware protocol, offering true hardware-level brightness adjustments when supported. Lunar doesn’t just adjust brightness. It intelligently adapts to environmental conditions by using external or built-in ambient light sensors and location-based cues like sunrise and sunset times. Users can fine-tune many aspects of their displays, including volume, contrast, screen orientation, and input switching, all through native macOS interfaces or customizable hotkeys. The tool also includes advanced features such as dimming below 0% for low-light conditions and blackout controls that power off screens without disrupting connected hardware. -
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MimiClaw
Run OpenClaw on a $5 chip
MimiClaw (from the mimiclaw project) is an edge-AI personal assistant that runs directly on extremely low-cost hardware like an ESP32-S3 microcontroller without a full operating system, Node.js, or cloud backend. By running pure C on a bare-metal chip, MimiClaw brings AI interactions and persistent memory to a tiny USB-powered device you can carry in your pocket. You connect the device to Wi-Fi and chat with it using Telegram, making it a convenient always-on assistant for tasks like reminders, quick lookups, or custom AI interactions. Even though it’s running on minimal hardware, MimiClaw maintains local memory that persists across power cycles, enabling context continuity over time without relying on cloud services. Its architecture emphasizes privacy, low power, and portability, ideal for personal or hobbyist use cases where privacy and local control matter. -
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NPainter
Fast and simple digital painting software
NPainter is a fast and simple digital painting software, currently a work in progress, aiming to provide essential painting tools for artists. -
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NSync
nsync is a C library that exports various synchronization primitives
nsync is a portable C library that provides a collection of advanced synchronization primitives designed to facilitate safe and efficient multithreaded programming. It offers reader-writer locks, condition variables, run-once initialization, waitable counters, and waitable bits for coordination and cancellation between threads. Unlike traditional pthreads-based synchronization, nsync introduces conditional critical sections, allowing developers to wait for arbitrary conditions without explicit signaling or complex loop-based logic. This approach simplifies concurrency management and often improves readability and maintainability of multithreaded code. The library emphasizes efficiency, with locks and condition variables occupying minimal memory and supporting cancellation mechanisms through nsync_note objects rather than thread-level cancellation. Designed with portability and performance in mind, nsync can be compiled on Unix-like systems and Windows using a C90 compiler. -
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OpenRazer
Open source driver and user-space daemon to control Razer lighting
A collection of Linux drivers for Razer devices - providing kernel drivers, DBus services and Python bindings to interact with the DBus interface.
