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

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

    Deploy in 115+ regions with the modern database for every enterprise.

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  • 1

    OpenXava

    Automatic frontend engine for Java

    Automatic frontend engine for Java. Write just the domain classes in plain Java. Get a web application ready for production.
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    Downloads: 19 This Week
    Last Update:
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  • 2
    Yapsy

    Yapsy

    A fat-free DIY Python plugin management toolkit.

    A simple framework for plugin system development with as few dependencies as possible. It is designed to offer a set of very lean classes (plugin managers and plugin interfaces) which can easily be customised by decoration or inheritance. Yapsy v1.x supports Python2 and Python3. Its source package contains versions of the sources for both pythons. Yapsy v2+ supports Python 3 and it's development happens now on https://github.com/tibonihoo/yapsy/ Usage samples, advices and developer's documentations are available on the main website.
    Downloads: 28 This Week
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  • 3

    Eclipse and Java Video Tutorials

    Video tutorials for learning Java OOP programming with Eclipse.

    Free video screencam tutorials for Eclipse and Java. Includes "Eclipse and Java for Total Beginners", "Using the Eclipse Workbench", "Introducing Persistence", and "Using the Debugger". Intended for beginning and intermediate users and programmer. You can view the Total Beginners tutorials on Youtube at https://www.youtube.com/playlist?list=PLv6UtFrA7VEu4PtzJaGHHSeZBi6mdJtwv. You can read descriptions and download all of the tutorials at http://eclipsetutorial.sourceforge.net.
    Downloads: 4 This Week
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  • 4
    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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  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

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  • 5

    XML2CSV Spreadsheet Converter

    Converts XML to CSV using a spreadsheet app

    An MS Excel VBA macro converts XML to CSV. It demonstrates this capability by converting an XML-based Continuity of Care Document (CCD) into a slim Comma Separated Value (CSV) file.
    Downloads: 5 This Week
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  • 6
    Castle aspires to simplify the development of enterprise and web applications. Offering a set of tools (working together or indepedently) and integration with other open source projects, Castle helps you get more done with less code.
    Downloads: 2 This Week
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  • 7
    iGesture is a Java-based gesture recognition framework providing access to multiple gesture recognition algorithms and different input devices. The iGesture Workbench supports the definition and evaluation of customised gesture sets and algorithms.
    Downloads: 6 This Week
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  • 8
    This project has moved! Go to https://github.com/yenrab/qchybrid
    Downloads: 3 This Week
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  • 9
    The AJAX JSP Tag Library is a set of JSP tags that simplify the use of Asynchronous JavaScript and XML (AJAX) technology in JavaServer Pages. Development moved to Mercurial
    Downloads: 4 This Week
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  • Build Securely on Azure with Proven Frameworks Icon
    Build Securely on Azure with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

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  • 10
    PowerMops
    Mops is a full-featured, object-oriented stand-alone programming language for Mac OS X. Its interactive development environment provides for fluid and productive programming by allowing quick testing and modification of small code segments.
    Downloads: 3 This Week
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  • 11

    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: 1 This Week
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  • 12
    Distributed, object-oriented and event-driven LabVIEW based Control System Framework with some SCADA functionality. Documentation about the CS framework is provided via a dedicated web page, http://wiki.gsi.de/cgi-bin/view/CSframework/WebHome . Please note: This project is deprecated an no longer actively maintained. Please follow the link above for more information.
    Downloads: 4 This Week
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  • 13
    Sort, filter and aggregate lists of business objects without all the boring code! This library provides a powerful "view" approach to data binding .NET objects to user interface controls.
    Downloads: 1 This Week
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  • 14
    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: 1 This Week
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  • 15
    A Java framework for writing sprite based games (turn-based, card, and arcade games.) Provides: Sprite management, rendering (Java2d or OpenGL), Collision Detection, Sprite widgets (buttons etc...), visual editor for layout of game widgets.
    Downloads: 3 This Week
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  • 16
    The 4Ever framework provides a OO access layer to a single or a set of XML files. The framework offers a set of basic management services as loading/saving, change history, and consistency checking. It is realized in a component-oriented way.
    Downloads: 1 This Week
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  • 17
    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: 1 This Week
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  • 18
    A framework that provides AJAX technologies for web pages created with ASP.NET. It allows developers to easily integrate AJAX support into their pages without replacing the ASP.NET controls and/or writing javascript code.
    Downloads: 2 This Week
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  • 19
    Common Java data structure library used by multiple projects. See http://verdantium.blogspot.com/
    Downloads: 2 This Week
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  • 20
    Java API to support binding system for java (xml, json, sql mapping). Supply class and interface to buil a mapping framework to java.
    Downloads: 1 This Week
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  • 21
    Zigmoyd Is an well Documented open source php Framework based on OOPS works both on PHP4 and 5 with the professional and Industrial Standerds like MVC, ORM, Scaffolding ..... released under LGPL Licence that fits under the common shared Hosting packages
    Downloads: 1 This Week
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  • 22
    Adventure PHP Framework (APF)
    The adventure php framework understands itself as a utility to implement object oriented and generic PHP web applications. It supports the developer to create programms in compliance with approved software design patterns.
    Downloads: 3 This Week
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  • 23
    Beagle is a Java lightweight framework to fetch database entries in an optimized data structure.It can be useful in those application that need to a fast data access.It is designed around Agile Methodologies with pattern of Test Driven Development.
    Downloads: 1 This Week
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  • 24
    C# Framework that implements the iRobot Roomba SCI spec. Also included is a diagnostic application named Roomba-Term that uses the framework. I invite you to use the Roomba-Term software as a tool & an example on how to program with the C# SCI
    Downloads: 1 This Week
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  • 25
    CPPSERV is an application server/servlet container providing Servlet-like API in C++ and CSP (C++ Server Pages) compiler. Currently Apache-2.0 and ligttpd web servers are supported.
    Downloads: 1 This Week
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