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

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  • 1
    Anna is lightweight Java framework to build pipeline systems of any kind. It will take care of recurrent needs such as dependency management, data serialisation and synchronization as well as parallelization of execution.
    Downloads: 0 This Week
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  • 2
    Un sistema formato da server, client, linguaggio di script, controllo versione e distribuzione automatica. Tutto questo per creare applicazioni di tipo enterprise che lavorino principalmente con database.
    Downloads: 0 This Week
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  • 3
    The Annotated Object Validator provides a mechanism for writing validators for any Object using Java Annotations. This allows for complex, reusable validation code to be constructed and applied to Fields and Classes with a minimum amount of effort.
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  • 4
    Ever wanted to create notes for pages on the web and be able to share them? This framework allows to create annotations to XML and HTML documents. Annotations are independent of presentation and can be traced back even if part of the document changed.
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    Build Agents and Models on One Platform

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  • 5
    Anokha is a MVC web framework based on Java/J2EE technology that simplify the enterprise application development by providing a set of presentation and business tier components being J2EE-API independent and high extensible. Easy to use and learn.
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  • 6
    Antidoto is a java technology mashup providing building blocks for modular architectures. Antídoto is the portuguese word for antidote. An antidote is a substance which can counteract a form of poisoning.
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  • 7
    Apache Beam

    Apache Beam

    Unified programming model for Batch and Streaming

    Apache Beam is an open source, unified programming model to define both batch and streaming data-parallel processing pipelines, as well as certain language-specific SDKs for constructing pipelines and Runners. These pipelines are executed on one of Beam’s supported distributed processing back-ends, which include Apache Apex, Apache Flink, Apache Spark, and Google Cloud Dataflow. Beam is especially useful for Embarrassingly Parallel data processing tasks, and caters to the different needs and backgrounds of end users, SDK writers and runner writers.
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  • 8
    Apache Cocoon 2.2 Beispiele die im Buch "Apache Cocoon" im dPunkt Verlag beschrieben werden. Beispiele können auch unabhängig vom Buch den Einstieg in Cocoon erleichtern.
    Downloads: 0 This Week
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  • 9
    Apache Flink

    Apache Flink

    Stream processing framework with powerful stream

    Apache Flink is a distributed engine for stateful computations over data streams and batches, designed for low-latency processing at scale. Its core runtime executes dataflow graphs with fine-grained backpressure and checkpointing, allowing applications to recover consistently from failures. Flink’s event-time model and watermarks enable accurate out-of-order processing, windowing, and complex time semantics that typical real-time systems struggle with. Developers program against high-level APIs—DataStream and Table/SQL—to express transformations, joins, and stateful patterns, while specialized libraries support CEP, machine learning workflows, and connectors. A rich connector ecosystem integrates with systems like Kafka, Kinesis, filesystems, JDBC sources/sinks, and object stores. Deployments span Kubernetes, YARN, Mesos, and standalone clusters, and operational features such as savepoints, state backends, and metrics make long-running jobs manageable in production.
    Downloads: 0 This Week
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    MongoDB Atlas runs apps anywhere

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  • 10
    Apache InLong

    Apache InLong

    Apache InLong - a one-stop integration framework for massive data

    Apache InLong is a one-stop integration framework for massive data that provides automatic, secure and reliable data transmission capabilities. InLong supports both batch and stream data processing at the same time, which offers great power to build data analysis, modeling and other real-time applications based on streaming data. InLong (应龙) is a divine beast in Chinese mythology who guides the river into the sea, and it is regarded as a metaphor of the InLong system for reporting data streams. InLong was originally built at Tencent, which has served online businesses for more than 8 years, to support massive data (data scale of more than 80 trillion pieces of data per day) reporting services in big data scenarios. The entire platform has integrated 5 modules: Ingestion, Convergence, Caching, Sorting, and Management, so that the business only needs to provide data sources, data service quality, data landing clusters and data landing formats.
    Downloads: 0 This Week
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  • 11
    Apache Shiro

    Apache Shiro

    Apache Shiro

    Apache Shiro is a powerful and easy-to-use Java security framework that performs authentication, authorization, cryptography, and session management. With Shiro’s easy-to-understand API, you can quickly and easily secure any application, from the smallest mobile applications to the largest web and enterprise applications.
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  • 12
    An implementation of an object-oriented UI for Naked Objects framework, implementing using Apache Wicket.
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  • 13
    The Apenmool Framework is a generative programming system to faciliate rapid application development. The specifications of a project are stored in XML and Java files. A code generator is then used to build the application in a variety of configurations.
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  • 14
    Java Enterprise Application which provides web services and database persistence models using JEE standards such as JAX-WS and JPA, using dependency injection provided by Spring Framework. Designed to serve as starting point for JEE development.
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  • 15
    Apollo

    Apollo

    Java libraries for writing composable microservices

    Apollo is a set of Java libraries that we use at Spotify when writing micro-services. Apollo includes features such as an HTTP server and a URI routing system, making it trivial to implement RESTful services. Apollo has been used in production at Spotify for a long time. As a part of the work to release version 1.0.0 we are moving the development of Apollo in to the open. The apollo-api library defines the interfaces for your request routing and request/reply handlers. The apollo-core library manages the lifecycle (loading, starting, and stopping) of your service and defines a powerful module system for adding functionality to an Apollo assembly. You do not usually need to interact directly with apollo-core; think of it merely as “plumbing.” The apollo-http-service library is a standardized assembly of Apollo modules. It incorporates both apollo-api and apollo-core and ties them together with several other useful modules to get a standard API service.
    Downloads: 0 This Week
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  • 16
    AppDriver is a non-invasive framework for the development of Java applications. It uses existing solutions for example Eclipse RCP, Spring, Hibernate to provide the infrastructure for persistence, UI etc. AppDriver works with every kind of POJOs
    Downloads: 0 This Week
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  • 17
    Applacrity is a framework for the rapid development of web applications that provides Ruby on Rails like ease of use combined with the power of the Java and J2EE platform.
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  • 18
    Aracnis is a Java based framework for building distributed web spiders. These spiders can be used to accomplish a variety of tasks, for example, screen-scraping and link integrity checking.
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  • 19
    The Aragon Framework is a generic, module-based SWT Java application framework. It provides several (bound-in) services to support fast application development.
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  • 20
    Architecture Application Framework is JavaEE Web Application Development Framework. Rapid Development Using Struts Wrapping Framework and Extends Apache Commons DBUtil JDBC Framework.
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  • 21
    ArchivedLayout separates the GUI description from the business logik. Layouts are described in well-readable XML files and dynamicly bound to Java fields and methods of the underlying program. Created in 2001. Used in several projects. Enjoy.
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  • 22
    The Areath project aims to create an easily reusable framework for putting together modernized (but still pleasingly retro) text-based games. Legends of Areath is a full game built using the framework.
    Downloads: 0 This Week
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  • 23
    Argos is a middleware system that lets you easily create and deploy software components, webpages, widgets, J2ME applications and panels and bind them together into services. Argos uses a microkernel that enables developers to extend the system functiona
    Downloads: 0 This Week
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  • 24
    Argus is a JMX browser and instrument panel viewer designed for the Argos project. Argus is however a generic JMX browser and will work with all JMX enabled systems.
    Downloads: 0 This Week
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  • 25

    Armature

    Java ARM support for standards, Maven, & archetypes

    The project creates a standard for Java implementations of ARM applications. It uses an asynchronous event model with threading that is standard for any board the runs Java on an ARM processor. The set of interfaces, abstract classes, events and enums create a standard that help enforce the write once, run anywhere credo. This will make code more portable and readable. Main Area: https://sourceforge.net/p/armature/discussion/
    Downloads: 0 This Week
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