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.

  • 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
  • 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
    Monolith (lith) is a tiny, java-based embedded file-system like implementation. It allows you to store and retreive multiple sets of named data in a single file and access it without the speed costs typically associated with file archives.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 2

    Mvc Infraestructure

    Serializable Data Transfer Object/Generic Dao for J2EE

    Dto.java and others classes - for data transmission from/to view (with EL - Expression Language" ) layer to/from business and persistence layer in J2EE application. Dto extends from HashMap class of Java API for encapsulate any type of information by key type:key_i.key_ij.key_ijk....: Any component in any J2EE functional chain can access to DTO if they know the key key_i.key_ij.key_ijk.... for object access. This project helps to decouple the data, business logic and persistence logic allowing portability between different frameworks gently.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 3
    Needle is a simple dependency injection framework for configuring POJOs from properties files using annotations. Supports all numeric types, enums, arrays, collections and maps. Just drop into your classpath and never read a properties file again!
    Downloads: 1 This Week
    Last Update:
    See Project
  • 4
    Needle

    Needle

    Effective Unit Testing for Java EE

    Needle is a lightweight framework for testing Java EE components outside of the container in isolation. It reduces the test setup code by analysing dependencies and automatic injection of mock objects. It will thus maximize the speed of development as well as the execution of unit tests. Follow us on Twitter (@NeedleProject)
    Downloads: 1 This Week
    Last Update:
    See Project
  • 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
  • 5
    The FBench is the ongoing development of an open-source graphical software tool for embedded automation components and systems based on the IEC 61499 standard. The project originates from the OOONEIDA Workbench pioneered by Dr. James Christensen in 2005.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 6
    ORB (Object Relational Bridge) is an all Java O/RM database persistence solution.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    Oberon PLM
    Oberon PLM is a Web based PLM/PDM, built on Oberon framework that facilitate its customization. Oberon PLM integrates people, data, processes, and business systems and provides a product information backbone for companies and their extended enterprise.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    Ontimize
    Ontimize is an agile declarative high-level framework designed for increasing developer productivity when building and implementing RIA enterprise application solutions. Learn more on http://www.ontimize.com
    Downloads: 1 This Week
    Last Update:
    See Project
  • 9
    Oxygen Persistence Framework (http://oxygen.io) - highly flexible, high performance, layered object relational mapping framework with clustered loading, oosql and pluggable feature architecture. It is used in large projects already.
    Downloads: 1 This Week
    Last Update:
    See Project
  • Easily Host LLMs and Web Apps on Cloud Run Icon
    Easily Host LLMs and Web Apps on Cloud Run

    Run everything from popular models with on-demand NVIDIA L4 GPUs to web apps without infrastructure management.

    Run frontend and backend services, batch jobs, host LLMs, and queue processing workloads without the need to manage infrastructure. Cloud Run gives you on-demand GPU access for hosting LLMs and running real-time AI—with 5-second cold starts and automatic scale-to-zero so you only pay for actual usage. New customers get $300 in free credit to start.
    Try Cloud Run Free
  • 10
    An add-on package for implementations of Contexts and Dependency Injection for the Java EE platform (CDI - JSR-299) providing convenient integration with Perf4j - performance monitoring library for Java applications.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 11
    The Jcptbr is a framework for object-relational mapping written in the Java language. This framework addresses the problem of incompatibility between object and relational models, without the necessity of using xml for the mapping.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 12
    Physhun is a Java framework for building and executing finite state machines in J2SE and J2EE environments. State models are defined as collections of Spring beans, and do not use proprietary modeling languages. The framework is simple and flexible.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 13
    Pikk - Object Relational Mapping ( ORM ) Framework Pikk’s primary feature is Object-Relational mapping from Java classes to database tables and from Java data types to SQL data types.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 14
    A small and simple annotation-driven bean persistence package that allows the developer to define template-based sql statements for all operations.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 15
    As of 03/2017, this project is moved to GitHub: https://github.com/cyberborean/rdfbeans ---- A simple Java-to-RDF databinding framework for transparent mapping JavaBean-like objects to RDF resources and vice versa.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 16
    Raindrop is a Java based framework based on SEDA (Staged Event Driven Architecture) principles. It focuses on providing highly concurrent server side throughput by managing and controlling Thread usage and concurrency primitives.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 17
    Riser is a dynamic object framework that aims to make business logic easy to code and maintain. Also in the scope of the project is creating UI tools that will bind to the dynamic objects and make it easy to keep model and presentation logic separate.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 18
    SAP-JCO Support is a mapping framework for Java applications requiring SAP access. You can easily define your SAP BAPI call in XML and map the SAP fields to java value object fields. Included features are SearchHelp support and an SQL-ish query language.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 19
    SBSTFrame
    There are a large variety of tools for application of many techniques of software testing. Likewise, there are a variety of frameworks that facilitate developing search techniques (e.g. Metaheuristics ). However, there are few tools available to the integration of these tools, which would be suitable for the application of SBST (Search Based Software Testing). Furthermore, such tools require an advanced knowledge of software testing techniques and optimization techniques. Thinking about it, the SBST Group from Informatics Institute at Universidade Federal de Goiás, are developing the SBSTFrame focuses in the integration of these two types of tools to facilitate the application of search techniques in problems of Software Testing area. The SBSTFrame plays the role of a top layer compared with software testing tools and frameworks of search techniques layer, to the communication between them could be done transparently to the user.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 20
    Scub Foundation
    Scub Foundation est un socle technique Java Open Source qui rassemble un ensemble de frameworks, de conventions, d'outils et de procédures qui structurent les développeurs et leurs développements.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    A light-weight JSR-286 compliant portlet container with 2 distinct features: 1.Site hierarchy: sites inherit or selectively overwrite parent sites layouts, sharing the same functionality 2.Selective DB-based translation framework based on site hierarchy
    Downloads: 1 This Week
    Last Update:
    See Project
  • 22
    JPA framework to create persistent entity management programs. Intensive introspection based.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 23
    SimDB is an object-relational database persistence library with emphasis on simplicity and ease of use. It follows the Model-Driven paradigm, providing an effective implementation of object/relational mapping on top of JDBC and standard SQL.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 24
    Web-based Information Systems for Everybody. Declare screens and DB tables of your application in XML, and have JSPs, session & CMP entity EJBs generated automatically. All that is needed to develop are business logic model classes as POJO.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 25
    Provides a framework to allow multiple components of a program communicate through a singular interface.
    Downloads: 1 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB