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

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  • 1
    Simple header-only library written in C++, for lexical analysis of files in PDF format
    Downloads: 0 This Week
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  • 2
    C++ Simulated Travel Distribution System
    That project aims at providing a clean API and a simple implementation, as a C++ library, of a Travel-oriented Distribution System. It corresponds to the simulated version of the real-world Computerized Reservation Systems (CRS).
    Downloads: 0 This Week
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  • 3
    C++ Standard Airline IT Object Library
    That project aims at providing a clean API, and the corresponding C++ implementation, for the basis of Airline IT Business Object Model (BOM), ie, to be used by several other Open Source projects, such as RMOL, Air-Sched, Travel-CCM, OpenTREP, etc.
    Downloads: 0 This Week
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  • 4
    A random collection of c++ tidbits. I write some code as I go along. Maybe this is useful to anyone. Maybe I will turn some of it into a library at some point. But not now.
    Downloads: 0 This Week
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  • 5
    C++ physical unit library (miles, pounds, seconds, etc) that handles conversions and unit less transport of physical values. Useful for applications that measure physical units of measurement.
    Downloads: 0 This Week
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  • 6
    C++ command line parameters parser
    Command line parameters parser, calls corresponding user functions and, if necessary, checks type/semantic of values of inputed parameters. Uses Boost C++ libraries.
    Downloads: 0 This Week
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  • 7
    C++dbc

    C++dbc

    Generic C++ database connectivity class library

    A C++ database connectivity class library supporting different database management systems under a simple interface. The API is hiding implementation details from developers, so class usage is same for each database management system.
    Downloads: 0 This Week
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  • 8
    Computer System for Adaptive Intelligent Life :: seeks to create a software system that is capable of learning. The project's ultimate goal is to further the ability of software to both adapt to individual users, and to respond their needs.
    Downloads: 0 This Week
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  • 9
    C/CIF

    C/CIF

    Compact/ Chess Interchange Format

    C/CIF is an interchange format for chess applications. This format is supporting all features of a chess application - PGN does not provide this - and can be used to transfer chess archives without any loss via an application independent format. C/CIF is supporting two formats: the binary format CCIF, and the human readable format CIF (in XML).
    Downloads: 0 This Week
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  • 10
    This is simple library to allow writing ATI CAL kernels directly in C++. The syntax is very similar to OpenCL. Also C++ wrapper for CAL is included.
    Downloads: 0 This Week
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  • 11
    CFI

    CFI

    Common Facilities Infrastructure

    libcfi - A library of useful infrastructure components for C++ programs on the Linux platform. libcdi - A library for testing and tracing C++ programs. This code has a full test suite and has been used in several projects. It should be quite reliable.
    Downloads: 0 This Week
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  • 12
    CGC Common Library
    This is a shared library containing all the code which is common to all games that may be plugged into the CGC framework
    Downloads: 0 This Week
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  • 13
    CHOW Phaser

    CHOW Phaser

    Phaser effect based loosely on the Schulte Compact Phasing 'A'

    ChowPhaser is an open-source audio plugin that emulates the classic Schulte Compact Phasing 'A' effect. It offers a unique phasing effect with nonlinear feedback and modulation capabilities, suitable for various audio processing applications.
    Downloads: 0 This Week
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  • 14

    CIGI Compliance Tools

    Tools for Testing IG CIGI Compliance

    Tools for testing CIGI IG and host implementations against the CIGI standard.
    Downloads: 0 This Week
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  • 15
    CLIck

    CLIck

    a CLI generator and and SW library

    CLIck allows you to create flat or hierarchical CLI (command line interfaces) in an extremely easy and quick way, supporting very popular features like history with command recalling, context-based auto-completion, tab-based command list, automatic command-line help, special characters, automatic structure builder, and much more. CLIck is written in ANSI C and tested on C and C++ applications on several architectures. It doesn't depend on any external library and uses only a very small subset of POSIX APIs. Despite the project name, you won't need your mouse at all!
    Downloads: 0 This Week
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  • 16
    Many programs for the console need command-like interaction with the user. CLIsystem is a library which processes the user's input. This includes parameter separation, type conversion and hashing. Finally an object is sent to the programmer.
    Downloads: 0 This Week
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  • 17
    COMTAY

    COMTAY

    Coroutines for Delphi and Free Pascal

    The COMTAY coroutine manager makes it easy to create and manage coroutines in Delphi and Free Pascal. Download COMTAY at https://opensimply.org/comtay The approach implemented in COMTAY allows the use of cooperative multitasking in both procedural and class-based programming.
    Downloads: 0 This Week
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  • 18
    CPU Features

    CPU Features

    A cross platform C99 library to get cpu features at runtime

    cpu_features is a cross-platform C library developed by Google that provides a simple and efficient way to detect available CPU features at runtime across a wide range of architectures and operating systems. It enables applications to determine which instruction sets (such as SSE, AVX, or NEON) are supported on the host machine, allowing developers to optimize performance dynamically. The library supports numerous architectures—including x86, ARM, AArch64, MIPS, POWER, RISCV, LoongArch, and s390x—and works on major operating systems like Linux, macOS, Windows, FreeBSD, Android, and iOS. Implemented in portable C99, it is thread-safe, has no memory allocations, and raises no exceptions, making it suitable even for use in low-level system libraries. The design emphasizes portability, extensibility, and compatibility with sandboxed or restricted environments where direct CPU access may be limited.
    Downloads: 0 This Week
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  • 19
    CPlusPlusThings

    CPlusPlusThings

    Collection of various C++ code samples, utilities, patterns

    CPlusPlusThings is a repository collecting various C++ code samples, utilities, patterns, and small example projects. It is less a polished product and more a learning/reference collection of snippets and usages of C++ idioms, data structures, algorithms, utilities, and perhaps tricks or meta-programming exercises. (No prominent README or detailed docs were available from my quick search.) Example implementations of data structures and algorithms. Organized as a learning repository (rather than a production framework). Encourages reuse and adaptation by developers as a reference. Collection of C++ utility code snippets/helper modules.
    Downloads: 0 This Week
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  • 20
    An open-source library to support Stanford's course 'Programming Abstractions', CS106B/X. Written initially for Linux, but porting to Windows/MinGW is planned.
    Downloads: 0 This Week
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  • 21

    CSS Preprocessor

    CSS validation and advanced preprocessor with nesting and variables

    CSS Preprocessor is a parser, compiler, and assembler which extends the CSS language to allow nested rules and attributes, variables / @mixin, functions, and especially, strong validation of your source code so you know that it will work the first time you use it in your browser. The library is written in C++ allowing any other C++ project to work with CSS without having to rewrite their own parser. The library supports 4 output levels from ultra compressed CSS code to beautified CSS code. The preprocessor features are based on other existing CSS processors such as SASS and {less}, although the syntax is mainly based on the SASS syntax (i.e. variables use the $ character as their introducer). See the Wiki and csspp documentation for additional information.
    Downloads: 0 This Week
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  • 22

    CSV Toolkit

    A simple CSV toolkit written by and for a beginner

    For those of you who use CSV's in your day to day work, I thought a simple CSV toolkit would be useful in order to perform simple and everyday tasks to manipulate and create CSV's.
    Downloads: 0 This Week
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  • 23
    CTokenizer accepts C++ syntax as input and outputs a vector of CToken objects, which contain a token string and a(n enumerated) token type, which can then be used to parse the input.
    Downloads: 0 This Week
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  • 24
    CUDA API Wrappers

    CUDA API Wrappers

    Thin, unified, C++-flavored wrappers for the CUDA APIs

    CUDA API Wrappers is a C++ library providing high-level, modern wrappers for NVIDIA’s CUDA runtime and driver APIs, enhancing usability and efficiency. It is intended for those who would otherwise use these APIs directly, to make working with them more intuitive and consistent, making use of modern C++ language capabilities, programming idioms, and best practices. In a nutshell - making CUDA API work more fun.
    Downloads: 0 This Week
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  • 25
    This project has moved to https://github.com/lipnitsk/libcue
    Downloads: 0 This Week
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