C++ Object Oriented Software

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

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

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  • Auth for GenAI | Auth0 Icon
    Auth for GenAI | Auth0

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  • 1
    SMC - The State Machine Compiler

    SMC - The State Machine Compiler

    Translates state machine into a target programming language.

    SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See User Manual for more info.
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    Downloads: 27 This Week
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  • 2
    Gambas
    A Graphical Developement Environment based on a Basic Interpreter with object extensions.
    Downloads: 17 This Week
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  • 3
    STLSoft C and C++ Libraries
    Robust, Lightweight, Cross-platform, Template Software. STLSoft is a collection of STL and standard library extensions, and facades over operating-system and 3rd-party APIs.
    Downloads: 9 This Week
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  • 4

    PythonQt

    Dynamic Python binding for Qt Applications

    NOTE: PythonQt has been moved to https://github.com/MeVisLab/pythonqt PythonQt is a dynamic and lightweight script binding of the Qt framework to the Python language. It can be easily embedded into Qt applications and makes any QObject derived object scriptable via Python without the need of wrapper code generation.
    Downloads: 6 This Week
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  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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  • 5

    libthreadar

    C++ library to manage threads and any type of exception between them

    Libthreadar is a C++ library providing an abstracted set of C++ *classes* to manipulate threads in a very simple and efficient way from your C++ code. It also handles exceptions thrown from a thread and propagated to another one, when the later is calling the thread::join() method. This let one manage exceptions as simply as it is in C++ single threaded context. Additionally, all the related objects around multi-threading (mutex, semaphore, ...) are provided, under easy to use and independent C++ classes. Other more advanced classes ease the information exchange between threads like scattering and gathering a collection of objects between many threads, or asynchonous buffered information exchanges between two threads. All these C++ classes are easy to use and fully documented
    Downloads: 21 This Week
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  • 6
    STD Foundation Classes

    STD Foundation Classes

    Object oriented frameworks - PowerBuilder, PowerServer & InfoMaker!

    by Chris Pollach (http://chrispollach.blogspot.ca) A fully integrated "object oriented" set of PB Classes for the following products: PowerBuilder, PowerClient & PowerServer. The framework greatly enhances the development process by making the PowerBuilder developer significantly more productive! License: https://sourceforge.net/projects/stdfndclass/files/License (Open Source) => Updated version of the STD "Integrated" framework 2025R1 build 2025.1.0.436 was released to production on 2025-06-09. https://sourceforge.net/projects/stdfndclass/files/FrameWork/Integrated => The STD "Web Service" framework 2022R2 build 2021.2.0.106 is the last release to production on 2021-05-12. This PB feature is now discontinued as of PB 2021 https://sourceforge.net/projects/stdfndclass/files/FrameWork/WebService => Updated version of the STD "Order Entry" example App 2025R1 build 2025.1.0.626 was released on 2025-05-29. https://sourceforge.net/projects/stdfndclass/files/Applications
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    Downloads: 11 This Week
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  • 7

    Active Object real-time OS

    AO RTOS is small real time OS based on Active Object concurrency model

    AO-RTOS is a pure object-oriented small footprint real-time operating system for embedded devices. The project is using Active Object (or Actor) concurrency model and finite state machine (FSM) design template as implementation base.
    Downloads: 3 This Week
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  • 8
    The CINT Smartcard project is a collection of tools and libraries for testing smart card. Now it consists of a GUI tool, TestCase Manager, and two CINT pre-compiled libraries, pcsclib & gsmlib, to support PC/SC card reader and GSM commands respectively.
    Downloads: 8 This Week
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  • 9
    Eserciziari di C++ e Java sul progetto object-oriented e la realizzazione di strutture dati. C++ and Java Exercise books (in Italian language) about object oriented data structures design and implementation.
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    Downloads: 8 This Week
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  • 10
    Small footprint C++ library to extract an XPath 1.0 expression from an XML tree. Uses the TinyXML project to parse XML trees and store intermediate results. Runs on any platform. Optional use of STL. Overhead less than 100KB, including TinyXML.
    Downloads: 6 This Week
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  • 11
    TTMath - a bignum library for C++
    A bignum library written in the C++ programming language as templates. It provides standard mathematical operations like add, sub, mul, div, pow etc. with the big integer and big floating point numbers.
    Downloads: 2 This Week
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  • 12
    The converter performs automatically the full process of converting the files of a C project into the equivalent C++ files. Classes are created, var and functions becomes attributes and methods and the changes are propagated into all files.
    Downloads: 5 This Week
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  • 13
    KeyValue
    KeyValue is a cross-platform library for making C++ objects accessible through LibreOffice Calc, Excel and other front-ends. Experience of spreadsheet users is enhanced by an object model and a handy key-value based interface.
    Downloads: 5 This Week
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  • 14
    ELENA Programming Language

    ELENA Programming Language

    an object-oriented language with late binding

    ELENA is a general-purpose, pure object-oriented language with late binding. It promotes more object-oriented program design, reusable and more standardized code. The package includes compiler, IDE, ELENA libraries and samples
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    Downloads: 1 This Week
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  • 15
    wsdlpull is an efficient and powerful command line utility for dynamic inspection and invocation of WSDL web services.It provides a C++ library with dynamic WSDL invocation API,WSDL parser,Schema parser and Validator and an xmlpull Parser/Serializer.
    Downloads: 4 This Week
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  • 16
    Bobcat has moved to GitHub, and can now be reached at https://fbb-git.github.io/bobcat/ Please refer to github's location for the latest archive and releases.
    Downloads: 2 This Week
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  • 17
    FortWrap is a python script that parses Fortran 90/95/200X source files and generates wrapper code in the form of C++ classes. FortWrap is intended to be used with object oriented Fortran code that makes use of Fortran derived types. Project has moved to: https://github.com/mcfarljm/fortwrap
    Downloads: 2 This Week
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  • 18
    Libiqxmlrpc is C++ object-oriented library that represents an XML-RPC solution for both client and server. It supports HTTP and HTTPS, both single-threaded and multi-threaded computation models on the server side, method interceptors, and other features.
    Downloads: 1 This Week
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  • 19
    Object oriented reusable software classes designed to be used to construct larger software projects developed in multiple software languages.
    Downloads: 3 This Week
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  • 20
    AMMORIA (ARAB) is an object oriented programming language uses Arabic words instead of English words, to make learning programming for Arab children easy and fast, it's planned to support Urdo and Farsi too, AMMORIA has its won IDE and Visual stuff.
    Downloads: 1 This Week
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  • 21
    Head First Design Patterns translated to C++. Three separate translations are planned: 'Bronze' is literal; minimal (syntax) changes only. 'Silver' is semantic; more C++ idioms + leftover patterns. 'Gold' is (forthcoming and) modern; template based
    Downloads: 2 This Week
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  • 22
    PyKCS11: a complete PKCS#11 wrapper for Python, created using the SWIG compiler. API documentation: http://pkcs11wrap.sourceforge.net/api/
    Downloads: 2 This Week
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  • 23
    VOLE provides facades for driving COM/OLE automation objects from C++ with a natural, type-safe, and efficient syntax.
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    Downloads: 2 This Week
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  • 24
    The C# XMP Toolkit is a wrapper for Adobe's XMP Toolkit and will allow you to add, modify and/or delete XMP using any .NET 2.0 Application (ie. C#, VB.NET, etc.).
    Downloads: 1 This Week
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  • 25
    The Mirror library provides both compile-time and run-time meta-data describing common C++ constructs like namespaces, types, classes, their base classes and member variables, constructors, etc. and provides generic interfaces for their introspection
    Downloads: 1 This Week
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