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.

  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 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
  • 1
    A Java (and maybe .NET) library of objects that objectify SQL syntax and semantics, and render to various flavours of SQL. It allows one to programmatically construct SQL in Java. It's intended use is within other DB abstractions, as a rendering layer.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    This software is related to ST-Guide project, an initiative arisen at the Institute of Computing of State University of Campinas (IC-UNICAMP) to solve the practice guideline formalization and implementation problems.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    The STEP Framework is a multi-layer Java enterprise application framework with support for Web Applications (Servlet/JSP) and Web Services.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    SUF-Sales Utility Framework can be used to build any sales based application development. This tool lets the develpors to concentrate only on the presentation-logic. The back end processing and business logic were taken care through the XML configuration
    Downloads: 0 This Week
    Last Update:
    See Project
  • $300 in Free Credit for Your Google Cloud Projects Icon
    $300 in Free Credit for Your Google Cloud Projects

    Build, test, and explore on Google Cloud with $300 in free credit. No hidden charges. No surprise bills.

    Launch your next project with $300 in free Google Cloud credit—no hidden charges. Test, build, and deploy without risk. Use your credit across the Google Cloud platform to find what works best for your needs. After your credits are used, continue building with free monthly usage products. Only pay when you're ready to scale. Sign up in minutes and start exploring.
    Start Free Trial
  • 5
    Java based Web SVG Engine for making Gantt Diagram on SQL datasource
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    SWTLoader is an elegant hack to ease SWT program deployment. With SWTLoader you can produce self-contained, double-clickable jar files with the needed native files inside them. Users will just have to double click your file: no more scripts or installers
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    The SWWE is a Static Web Widget Engine, with this library the developer can create a web application in few minutes. This library does not require the developer to know HTML. It's based on Ajax and Java Servlet. A porting for .NET and Perl is planned.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Velocity, Dwr, Ibatis
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    Sahits Workflow is an easy to use and yet flexible workflow engine. The work to be done is delegated to methods defined by the user/developer. The Mapping can be done by xml files or database or any other means to retrieve data.
    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
    Application monitoring Framework and Command Center administration console to change application settings like alert scheme, monitoring timings, etc., Uses SOAP/XML webservice to communicate between Command Center and the monitored applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Sakura Boot

    Sakura Boot

    Framework on top of spring-boot that helps create back-ends

    This framework, built on top of Spring Boot, is designed to speed up the development of robust backends. It ensures adherence to best practices while allowing a high degree of customization. The framework is structured using a modular architecture, making it easy to add or remove features based on the project’s specific needs. While Spring Boot speeds up the development process, developers still require extensive knowledge, must ensure adherence to best practices, and often write repetitive code for each project. First, the name Sakura Boot is named to reflect its foundation on Spring Boot, while "Sakura" symbolizing the brief cherry blossoms season in Japan, this highlights the framework’s focus on rapid and efficient backend development.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Salto framework is an AJAX based framework which makes possible to build a Web application very quickly. Thanks to AJAX mechanism, datas exchanges between client side an server side are reduced. You are able to refresh only a part of the screen.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Sambuca is a Java HTTP Server framework allowing developers to embed a HTTP server in their apps with custom HTTP Request Handlers. Apps can host standalone HTTP Services (Web Service) without having to deploy full app server such as Tomcat or WebLogic.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Samosir is the library used to develop plugin modules for the Toba personal information retrieval application. It lets developers easily write modules that add functionality from within Toba and integrate with the internal database and search engine.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    These are sample OSGi bundles for education and practice purposes. They were designed on the IBM Service Management Framework, but should deploy on any OSGi SP3-compliant platform.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    This project was inspired by the magnificent work done in two of the major frameworks available today (Struts and JSF). The idea raised from a situation the I've faces during my line of work.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    ScUnit is a robust unit testing framework for Scala.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Scala with Sails is yet another web development framework that stresses security, ease of development, ease of deployment, compatibility with existing Java classes, and performance
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Small Java library to help your projects scan jars and classpaths for annotations and create an index of these annotations. The index allows annotation based frameworks to easily find classes they need to process.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    The Scenario API project is dedicated to scenario/workflow/pipeline like structures creation and execution. It includes the abstraction level, which is defined in subproject SDM (Scenario Definition Model) and one of the implementation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Scimpi is an ultra-lightweight framework for developing web applications that are based on strong domain models. It will appeal strongly to any developer who identifies with the principles of domain-driven design and/or agile development.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22

    SeBase

    Selenium Base Framework

    I am often asked to start a new Selenium (http://seleniumhq.org/) test automation project. Reinventing the wheel each time sucks. Everything in this SF project are various tips & tricks that I figured out over time. Each of the files under net.sourceforge.sebase.demos is a proof of concept (POC) to get a different technology to work with Selenium.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    SeQuaLite is a light-weight java persistence DAO framework. Though it's footprint is tiny,only one small jar, it is fast and powerful. Features: CRUD operations, Lazy-Load, Cascading, Pagination, POJO generator. Helps reduce development time effectively
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    SecFlow - Secure Flow Analyzation for Java and .NET
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    This project develops a secure P2P framework in Java (SePP). Existing P2P frameworks are not covering security by design but rather implement only some high layer security mechanisms. It has been developed as part of the EU project SMEPP (www.smepp.org)
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB