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.

  • Build AI Apps with Gemini 3 on Vertex AI Icon
    Build AI Apps with Gemini 3 on Vertex AI

    Access Google’s most capable multimodal models. Train, test, and deploy AI with 200+ foundation models on one platform.

    Vertex AI gives developers access to Gemini 3—Google’s most advanced reasoning and coding model—plus 200+ foundation models including Claude, Llama, and Gemma. Build generative AI apps with Vertex AI Studio, customize with fine-tuning, and deploy to production with enterprise-grade MLOps. New customers get $300 in free credits.
    Try Vertex AI Free
  • Cut Cloud Costs with Google Compute Engine Icon
    Cut Cloud Costs with Google Compute Engine

    Save up to 91% with Spot VMs and get automatic sustained-use discounts. One free VM per month, plus $300 in credits.

    Save on compute costs with Compute Engine. Reduce your batch jobs and workload bill 60-91% with Spot VMs. Compute Engine's committed use offers customers up to 70% savings through sustained use discounts. Plus, you get one free e2-micro VM monthly and $300 credit to start.
    Try Compute Engine
  • 1
    The Security Annotation Framework (SAF) is an instance-level access control framework and field-level encryption framework driven by Java 5 annotations.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    Seedling is a generic application platform enabling streamlined development of Java apps from reusable components. It is appropriate for client, server, headless or GUI applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    A Simple and Efficient Framework for Infinite Resolution Simulation; provides a Java Thread-like class that executes over simulated time. Time units are user-definable, no time quanta, and neither changes to the VM nor pre-processing are required.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    A Java library to run diagnostic tasks for a Web application at runtime. Configured tasks verify the availability of external resources such as property files, datasources and JNDI bindings. A run can detect problems ahead of using your application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 99.99% Uptime for MySQL and PostgreSQL on Google Cloud Icon
    99.99% Uptime for MySQL and PostgreSQL on Google Cloud

    Enterprise Plus edition delivers sub-second maintenance downtime and 2x read/write performance. Built for critical apps.

    Cloud SQL Enterprise Plus gives you a 99.99% availability SLA with near-zero downtime maintenance—typically under 10 seconds. Get 2x better read/write performance, intelligent data caching, and 35 days of point-in-time recovery. Supports MySQL, PostgreSQL, and SQL Server with built-in vector search for gen AI apps. New customers get $300 in free credit.
    Try Cloud SQL Free
  • 5
    SemREST is a Java framework for the semantic extension of RESTful Web Services.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    An object relational mapper for use with RDF databases. Initially focussing on Java - Sesame mapping.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Existing systems for multimedia personalization exploit semantically-rich information for the content creation. Once the content is created, this information is thrown away. The framework derives semantics and integrates it in the presentations.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    J2EE App to build a web portal, It uses RDF-OWL-JENA to handle sections and the relation between them. it uses templates to give the feel & look and content can be publish from web or from a plug in for Microsoft Office and Open Office. see Home page
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    Semtinel is an application framework for the semi-automatic creation, maintenance and analysis of hierarchical concept schemes (thesaurus, classification or ontology). Semtinel supports the development of new analysis methods and visualization techniques
    Downloads: 0 This Week
    Last Update:
    See Project
  • Go from Data Warehouse to Data and AI platform with BigQuery Icon
    Go from Data Warehouse to Data and AI platform with BigQuery

    Build, train, and run ML models with simple SQL. Automate data prep, analysis, and predictions with built-in AI assistance from Gemini.

    BigQuery is more than a data warehouse—it's an autonomous data-to-AI platform. Use familiar SQL to train ML models, run time-series forecasts, and generate AI-powered insights with native Gemini integration. Built-in agents handle data engineering and data science workflows automatically. Get $300 in free credit, query 1 TB, and store 10 GB free monthly.
    Try BigQuery Free
  • 10
    This project provides runtime performance monitoring and reporting for Java applications. It includes a simple API with timers and counters, data persistence, support classes and aspects (AspectJ & Spring AOP), and a reporting web application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    ServEngine is a J2EE component suite for online applications development developed by Ignacio de Córdoba, from Red SKIOS S.A., a spanish software consulting company based in Madrid. ServEngine core uses JPA EJBs for Model and JSF2 for View through CDI.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    The ServeBox Foundry is an ActionScript 3 / Java framework designed for Flex 3 / Flex 4 applications development. For flex4 use the new version 3.0.0-beta. Its design is based on several design patterns, and includes tools built to resolve some of th
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    The Service Platform is used to manage distributed java computing environments. Java applications can be automatically distributed, installed and managed from a client with monitoring and log viewing, integrates with UNIX init and Windows Services.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    A lightweight framework for J2EE web applications which makes a clean step out of session handling problems when using persistence frameworks. Also features like aspect oriented JSF are introduced. All provided by a best-practice web application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    ServiceTalk

    ServiceTalk

    A networking framework that evolves with your application

    ServiceTalk is a JVM network application framework with APIs tailored to specific protocols (e.g. HTTP/1.x, HTTP/2.x, etc…​) and supports multiple programming paradigms. ServiceTalk is intended to provide a common and extensible networking abstraction on top of a lower-level networking framework (e.g. Netty). Netty is a great low-level networking framework, but when used for service-to-service communication it presents a few opportunities for improvement. Fully asynchronous and requires knowledge of EventLoop threading model. Executing CPU-intensive or "blocking" code requires manual thread hops. Subtle out-of-order execution of tasks when code executes both on and off the EventLoop thread. APIs are not tailored towards common application use cases (e.g. request/response, RPC, etc..) The asynchronous programming paradigm presents a barrier to entry in scenarios where vertical scalability is not a primary concern.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    A java WEB B/S development framework. Include: Database Operation, Template Operation, Form Operation, Flow Operation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    SfDT is a Eclipse plugin for the Symfony Framework. It provides a toolset for easier, faster and better developing process based on symfony framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Shadow

    Shadow

    Zero reflection fully dynamic Android plugin framework

    Shadow is an Android plug-in framework independently developed by Tencent, which has been tested by hundreds of millions of online users. Shadow not only shares the key code of plug-in technology with open source, but also completely shares all the designs required for online deployment. Reuse the source code of the independent installation App. The source code of the plug-in App can be installed and run normally. Zero reflection and no Hack implementation of plug-in technology. In theory, it has been determined that there is no need for compatible development of any system, and there is no hidden API call, which does not conflict with Google's strategy of restricting access to non-public SDK interfaces. It is difficult to implement a perfect plug-in framework at one time, but Shadow makes all these implementations dynamic so that the code of the plug-in framework becomes part of the plug-in.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Java-based security platform which provides a multi-user service middleware for distributed systems. Features: service environment, Shell-based interaction, user authentication (password, soft-token, smard-card), policy enforcement, Web services support
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Sign Engine - framework for plugin-based administration panels.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    A Spring-based IoC, AOP and MVC framework for Java ME (J2ME). Both MIDP and LWUIT APIs are supported.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    This project tries to create a very simple gui framework for Java(tm)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Think that Struts is still not good enough, check out SilkRoad,the J2EE web application framework, it is a complete solution include all the layer for an application, but much smaller and easier than Struts
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Simple Application Server framework. Create simple web services in an easy way.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Simple Binary Encoding (SBE)

    Simple Binary Encoding (SBE)

    Simple Binary Encoding (SBE) - High Performance Message Codec

    SBE is an OSI layer 6 presentation for encoding and decoding binary application messages for low-latency financial applications. This repository contains the reference implementations in Java, C++, Golang, C#, and Rust. More details on the design and usage of SBE can be found on the Wiki. An XSD for SBE specs can be found here. Please address questions about the specification to the SBE FIX community. For the latest version information and changes see the Change Log with downloads at Maven Central. The Java and C++ SBE implementations work very efficiently with the Aeron messaging system for low-latency and high-throughput communications. The Java SBE implementation has a dependency on Agrona for its buffer implementations.
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB