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.

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  • 1
    Gambas
    A Graphical Developement Environment based on a Basic Interpreter with object extensions.
    Downloads: 20 This Week
    Last Update:
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  • 2

    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: 21 This Week
    Last Update:
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  • 3
    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: 15 This Week
    Last Update:
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  • 4
    EiffelStudio
    EiffelStudio is an Integrated Development Environment (IDE) that provides comprehensive facilities to programmers. It offers a comprehensive suite of tools that enable programmers to produce correct, reliable, and maintainable software while keeping control of the development process. If you want to create fast, robust, scalable applications, then EiffelStudio™ will offer you a cost-effective solution. Imagine being able to model your system as you think – capturing your requirements and your thought processes with EiffelStudio. When ready to design, you build upon the model you just created, still with EiffelStudio. Then you implement with EiffelStudio. You never need to throw anything out and start over. You don’t need extra tools to go back and safely make changes in your architecture. Roundtrip engineering? It’s built in by design. Testing, metrics and productivity tools? They’re built in. EiffelStudio accommodates quickly and efficiently new thoughts and changes.
    Downloads: 5 This Week
    Last Update:
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    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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  • 5
    Unit testing, mock objects and web testing framework for PHP built around test cases. If you know JUnit/JMock or some of the PHPUnit clones this will need no explanation. Includes a native web browser for testing web sites directly (no JavaScript).
    Downloads: 1 This Week
    Last Update:
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  • 6
    Agar

    Agar

    Cross Platform GUI Toolkit

    Agar provides a base GUI framework and a standard set of widgets from which graphical applications can be built which run natively under X11, Windows, MacOS X, SDL and others. It takes advantage of texture and GPU acceleration wherever available. Agar can also attach to an existing framebuffer, SDL or OpenGL context and operate as a self-contained window-manager. It includes a standard library of general-purpose widgets, and is also designed to be extended externally. New widgets can be implemented as part of an application or library. Complex user interface elements can be realized often in few lines of code. Agar is also extensible at the low-level. The low-level API is documented such that modular drivers can be written which enable Agar applications to work seamlessly under many platforms graphics systems without any change at the application level.
    Downloads: 2 This Week
    Last Update:
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  • 7
    ObjetBDD is a Object Relational mapping (ORM) class, whitch encapsulate database's tables access, like Select, Insert, Update or Delete (CRUD : create, read, update, delete). It works with ADODB class.
    Downloads: 1 This Week
    Last Update:
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  • 8
    Seagull is an OO PHP application framework that has the following design goals: a) independence of data, logic & presentation layers; b) extensible component architecture; c) comprehensive error handling; d) integration with PEAR; e) coding standards
    Downloads: 1 This Week
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  • 9
    273 Loaded is an Enterprise-class eCcommerce Distribution derived from sources freely provided to the public by a prominent North American Enterprise eCommerce vendor.
    Downloads: 0 This Week
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  • 10
    API Allociné Helper is support for using the API of Allociné, of Screenrush, of Sensacine and of Filmstarts: find lots of information about movies, people, etc.
    Downloads: 0 This Week
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  • 11
    Le projet Atlantis est une collection de composants et de bibliothèques pour Lazarus. The Atlantis project is a collection of components and libraries for Lazarus.
    Downloads: 0 This Week
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  • 12
    AWL, "Another Wizard Library", is a java swing-based library that provides extended functionnalities to easily create rich wizards.
    Downloads: 0 This Week
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  • 13
    CartoWifi is a collection of php classes for wireless usage : displaying maps, computing distance between 2 nodes, link profile, user maxtrix with visibility checking and many else. keywords : php wifi wireless cartography maps GIS
    Downloads: 0 This Week
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  • 14
    D4Modelizer is a simple but powerful code generator. It produces C# code from your Database. Each table could be mapped to an object and its fields in properties. D4Modelizer propose a mapping schema between the database structure and the object model.
    Downloads: 0 This Week
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  • 15
    This project is a platform for creating and/or playing games. It's based on a framework that allow everybdy to create or use every module. For example if there is a 2D game, you can use it with a native 2D impl or an SDL impl or any other renderer.
    Downloads: 0 This Week
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  • 16
    A portable, high-level 3D engine with an emphasis on generality. So far it is mainly used in CAD applications in need of geometrical constraint solving and other geometrical methods. FreeSG is designed as an integrable component and not a framework.
    Downloads: 0 This Week
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  • 17
    Gaphor is a UML modeling environment written in Python. Gaphor is small and very extensible. The repository is located at http://github.com/gaphor/gaphor.
    Downloads: 0 This Week
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  • 18
    The HOOST (Hardware Object Oriented Standard Template) libraries define a set of C++ templates for handling usual hardware in embedded software; additionally it ports the STL to embedded environment and make the links with the hardware concepts defined.
    Downloads: 0 This Week
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  • 19
    .NET Controls and libraries for report making.
    Downloads: 0 This Week
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  • 20
    Open Source Pluggable PHP 5 Content Management System (CMS) that runs on a range of popular platforms and databases (MySQL, SQLite,PostgreSQL). HotPlug CMS is a fork of Wolf CMS, optimised for SEO, Accessibility and Mobile.
    Downloads: 0 This Week
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  • 21
    JOSAST ( Java Open Source Amateur Satellite Toolkit) is a set of java source code used for amateur satellite, hamradio and also astronomia activities ... Reusable package and complete software should be available.
    Downloads: 0 This Week
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  • 22
    Kjora Framework is a lightweight PHP 5.3 framework. It provides an architecture to build a Model-View based website, with a dynamic data access object, and a "One Page - One Class" system to design it.
    Downloads: 0 This Week
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  • 23
    LiteTemplate est une Class PHP pour gérer des templates. Cela permet de séparer le code PHP et HTML. Compatible PHP4. LiteTemplate is Class PHP to manage templates. That makes it possible to separate code PHP and HTML. Compatible PHP4.
    Downloads: 0 This Week
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  • 24
    User message support, Web Application manager, MVC component structure, Session managing system, Request managing system, User authentificate, Template support, Tag extension, Internationalize, Input form validation, Data base abstract layer and others
    Downloads: 0 This Week
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  • 25
    Open States Machines Designer is a Eclipse RCP based graphical editor for UML States Machines diagrams. It provides functionalities like Import/Export as XML and States Map Compiler Files, Code generation with SMC, UML validation rules...
    Downloads: 0 This Week
    Last Update:
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