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.

  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
    Sign up for free
  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    Build gen AI apps with an all-in-one modern database: MongoDB Atlas

    MongoDB Atlas provides built-in vector search and a flexible document model so developers can build, scale, and run gen AI apps without stitching together multiple databases. From LLM integration to semantic search, Atlas simplifies your AI architecture—and it’s free to get started.
    Start Free
  • 1
    EntityFS -- give your files identity! EntityFS is a object-oriented file system API, providing a large set of tools for working with file system entities (files and directories) from Java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    This project houses various examples to help developers see how to better use the server side work in Eclipse's Equinox project.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    EquinoxOSGi is a project to facilitate the development of Equinox and OSGi examples.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    Esession supplies an abstract layer for user session management with logging support. It could work both in stand-alone mode, and bound to http sessions. The solution for the log storage could either be in memory or in database.And there's a GUI monitor
    Downloads: 0 This Week
    Last Update:
    See Project
  • 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
  • 5
    Esfinge is a framework for the business and persistent layer for an enterprise application. The goal of Esfinge is to enable the fast creation of applications with an incredible flexibility in the system architecture.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    EsiGate
    This toolkit allows developpers to assemble several web applications into a single one. Pages are build using contents, resources and page templates coming from the original applications. The applications may use different technologies (Java, PHP...)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Essence is a simple Java framework with modules for Quantitative Analysis and Distributed Data systems.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Etch is a cross-platform, language- and transport-independent framework for building and consuming network services. With Etch, service development and consumption becomes no more difficult than library development and consumption.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    For Java, parses GNU standards compliant command line arguments and calls event handler methods/fields automatically, based on given arguments (cmd line & from file). Use annotations to define your options, and descriptions for the auto generated help.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 10
    .NET style event system written for Java
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    EventWeb creates a bi-directional channel between a browser and a web server. This allows the user to interact with a web application in the same way as a desktop application. Works with Java servlets or as a stand-alone application server.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Evver Games is an open source project that contains an AJAX web renderer and framework for creating card games; along with the card games Golf and No Peeking.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    XLL4J is a framework for developing excel addins in Java without the need to compile any C++ code.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Provides means for exception handling, substituting and logging via AspectJ and/or Spring AOP.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15

    Exception Handling

    Exception Handling Project

    Exception Handling is a project with the goal to make the Java exception handling cleaner and easier for the developer. This project uses the cross cutting concepts to achieve its goals, such as exception wrapping and handling.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    The goal of the Exceptor project is to create a Java framework to facilitate in the handling of exception instances in distributed environments.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Expand is an Open Source tool for easily developing professional Web applications. Is based on JEE5 standard technologies, annotations and pojos. Includes rapid prototyping features and a set of frameworks and wizards to ultra-fast creation of Web apps.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Express4J is an XML-based Java UI framework which is optimized for quick loading and a small memory footprint, primarily developed for providing rich, scriptable user interfaces inside Applets.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    ExpressionOasis is a java based framework for evaluating the various type of expressions like arithmatic, logic expression etc. The framework is flexible enough to define any new grammer rules or operators.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    ExtJS client and server side extension with a built-in ORM solution that can be used separately. Integration with Spring, JPA and JCR on server side as well as client side improved controls will simplify your development process and design decisions.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    You know the component scanning feature of Spring? You'll love this: component scanning as easy as select(javaClasses()).from("your.package").returning(allAnnotatedWith(YourAnnotation.class)). Can support any language running on the JVM. ---------- eXtcos is now also available from Maven Central. To include it into your Maven project just add this dependency: groupId: net.sf.extcos artifactId: extcos version: 0.4b Unfortunately Sourceforge doesn't support XML snippets in the description, so you'll have to build it yourself if needed. ----------- To read the user manual click the website link below.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Content Managment System with simple HTTP-based XML export filter
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    A framework that brings ease of development into the SOA. E-Z SOA.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Ezmid is a small API for small devices supporting JME/MIDP. It intends to make MIDP programming even easier, providing classes for communication, persistence, XML parsing and user interface. All of then written on the top o MIDP 2.0 API.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    (F)irm, (F)ast, (F)lexible and (F)ree Java Web Framework. Supports RESTful web services in a manner roughly based on JAX-RS and Jersey. Prevents mixing presentation and business layer by powerful template system and flexible, reusable components.
    Downloads: 0 This Week
    Last Update:
    See Project