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
    PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/jasypt/jasypt Jasypt (Java Simplified Encryption) is a java library which allows the developer to add basic encryption capabilities to his/her projects with minimum effort, and without the need of having deep knowledge on how cryptography works. PLEASE NOTE that we are in the process of moving to GitHub: https://github.com/jasypt/jasypt
    Downloads: 15 This Week
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  • 2
    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: 22 This Week
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  • 3
    Code 2 UML is a tool for constructing UML class diagrams from java .class and .jar files. Requirements: JRE 1.6
    Downloads: 7 This Week
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  • 4
    MyBatis

    MyBatis

    MyBatis SQL mapper framework for Java

    MyBatis is a first class persistence framework with support for custom SQL, stored procedures and advanced mappings. MyBatis eliminates almost all of the JDBC code and manual setting of parameters and retrieval of results. MyBatis can use simple XML or Annotations for configuration and map primitives, Map interfaces and Java POJOs (Plain Old Java Objects) to database records. Every MyBatis application centers around an instance of SqlSessionFactory. A SqlSessionFactory instance can be acquired by using the SqlSessionFactoryBuilder. SqlSessionFactoryBuilder can build a SqlSessionFactory instance from an XML configuration file, or from a custom prepared instance of the Configuration class. Building a SqlSessionFactory instance from an XML file is very simple. It is recommended that you use a classpath resource for this configuration, but you could use any InputStream instance, including one created from a literal file path or a file:// URL.
    Downloads: 1 This Week
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    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

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  • 5
    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: 13 This Week
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  • 6
    JoSQL (Java Objects SQL) provides SQL capabilities for querying, ordering and grouping of collections of Java objects (POJOs). It allows a SQL statement to be applied to the collection of objects and the matching set returned, ordered and grouped.
    Downloads: 7 This Week
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  • 7

    eBus

    Publish/Subscribe, Request/Reply Messaging API for Java.

    A Java middleware API supporting broker-less, type+topic-based publish/subscribe and request/reply messaging for both intra- and inter-application, object-level communication. Broker-less: messages are transmitted directly between eBus applications. There is no message broker (i.e. server) in between. Type+topic addressing: eBus clients subscribe to a message class (type) and message topic, providing stronger typing than just topic-based subscriptions. Object-level communication: eBus delivers messages directly to client objects, not to a client process.
    Downloads: 5 This Week
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  • 8
    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: 1 This Week
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  • 9
    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: 1 This Week
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    Train ML Models With SQL You Already Know

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  • 10
    Geocoding is the process of estimating a latitude and longitude for a given location. JGeocoder is a free Java geocoder. This project is loosely modeled after Geo::Coder::US, a Perl module available for download from the CPAN.
    Downloads: 1 This Week
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  • 11
    A light weight file IO library to ease the use of Java File IO related API and enable the testability.
    Downloads: 1 This Week
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  • 12

    Geeklog Plugins, Static Pages and Blocks

    Multilingual FAQ and other addons for the Geeklog CMS

    This is a plugin project for the Geeklog CMS, providing plugins, static pages and blocks. The main project is MultiFAQ - a multilingual FAQ that lets each user see the FAQ in their chosen language.
    Downloads: 1 This Week
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  • 13
    JPOX was an Apache2 licensed standards-driven Java persistence implementation. It is replaced by DataNucleus http://www.datanucleus.org
    Downloads: 1 This Week
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  • 14

    Java Validation Framework

    Java validation framework (not JSR-303 implementation).

    This framework allows to modify (correct) test values; supports validation of localized values; allows to convert values into and from text representation; formats error messages, depending on the context; supports metadata, which allows to check any entity types (not only Java Beans or POJOs) and more. Also this framework has long list of predefined validation components.
    Downloads: 1 This Week
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  • 15
    Microproperties is a flexible and extensible library for dealing with properties in applications written in Java ME (former J2ME). Read properties from MIDlet Manifest/JAD, a textfile or over internet via a URL. Set properties as never before in Java ME.
    Downloads: 1 This Week
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  • 16
    ====== OIL (Object Introspection Library) for C++ ====== Aims at Facilitating the Object Introspection Capabilities for C++ Developers. The Goals is to be able to display and modify the contents of any given C++ Object at run time.
    Downloads: 1 This Week
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  • 17
    Random Java utility classes 1. Prefix Trie based data structure 2. An indexed map (indexed by keys or values). 3. Main class that provides start/stop functionality for standalone apps. 4. File io api's based based on callback design.
    Downloads: 1 This Week
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  • 18
    .NET 2.0 reflection-to-cache-based library, with an ASP.NET UI generation feature. Uses Dynamic IL to generate VERY fast accessors to properties, and allows direct get and set of objects to controls that allow for their edit or display in ASP.NET forms
    Downloads: 1 This Week
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  • 19
    SnmpHibernate is a MIB/Object Mapping framework inspired by Hibernate Project(O/R Mapping framework).
    Downloads: 1 This Week
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  • 20
    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: 1 This Week
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  • 21
    The xWire framework is a toolkit used to build Java web applications, but is flexible enough for other uses. It is ideal for building AJAX apps and consists of both client and server components, each of which can be used independently of the other.
    Downloads: 1 This Week
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  • 22
    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: 0 This Week
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  • 23

    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: 0 This Week
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  • 24
    A main aim of this project is to deliver an infrastructure for HL-7 v3 compilant messages exchange. This infrastructure should be based on existing real time queueing system such as Apache ActiveMQ. A product of this project does not include user interfa
    Downloads: 0 This Week
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  • 25
    The Alphabetical Navigation Bar Java Display Tag Library, <nav:alphanavbar:*>, creates an alphabetic navigation bar, by slicing and dicing string data stored in a java.util.List object into 26 alphabetically sub list.
    Downloads: 0 This Week
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