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 Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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  • Go from Code to Production URL in Seconds Icon
    Go from Code to Production URL in Seconds

    Cloud Run deploys apps in any language instantly. Scales to zero. Pay only when code runs.

    Skip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
    Try it free
  • 1
    RJAX (Reverse aJAX) lets the web server push data to the browser. RJAX maintains an open connection between the browser and the server using an applet in the client page. The server can execute javascript commands directly on the client.
    Downloads: 0 This Week
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  • 2
    This projects aims at the development of a code mobility framework, with QoS features, for the Android OS.
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  • 3
    The Related Values Processing Framework helps the integration of Process Control Data Historian Systems.
    Downloads: 0 This Week
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  • 4
    You've reached the SourceForge page for the Racket project. More information about Racket can be found on the main site at http://racket.sourceforge.net
    Downloads: 0 This Week
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  • Train ML Models With SQL You Already Know Icon
    Train ML Models With SQL You Already Know

    BigQuery automates data prep, analysis, and predictions with built-in AI assistance.

    Build and deploy ML models using familiar SQL. Automate data prep with built-in Gemini. Query 1 TB and store 10 GB free monthly.
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  • 5
    Racoon is an application server for multi-player games. Its intention is to relieve game developers from recurring and time extensive tasks. This is achieved with a modular concept: only the game logic has to be written and deployed in Racoon.
    Downloads: 0 This Week
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  • 6
    Radix is a RAD framework for creating native XML web applications. Complete web applications can be created without programming knowledge using XML, XSLT, XPath and related technologies. Radix can be extended using Java, JavaScript, Python, and Tcl.
    Downloads: 0 This Week
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  • 7
    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: 0 This Week
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  • 8
    Raistlin is a fork of the "retired" Apache Merlin/Avalon projects. Raistlin is a Service Oriented Architecture (SOA) container built upon the Java platform providing common features such as logging, dependency management, configuration, and deployment.
    Downloads: 0 This Week
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  • 9
    Raken, web service controller, is based on JSON as a data definition language. it utilizes simple protocol, optional asynchronous interaction, recovery, localization, security, caching, batch, and multi-part messaging.
    Downloads: 0 This Week
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  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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  • 10
    Java HTTP framework, supporting both web applications and restful web services.
    Downloads: 0 This Week
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  • 11
    Ranka is an elegant, extensible framework for creating enterprise-ready Java web(2.0) applications based. It is designed to streamline the full development cycle, from designing, to building, to deploying, to maintaining applications over time.
    Downloads: 0 This Week
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  • 12
    RapidWAD is a web application development Framework/tool. it eliminates redundancy among three tiers of a typical web project. Allows developers to write pages with no or very less backend code. Very quick and useful for medium size applications.
    Downloads: 0 This Week
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  • 13
    Rapidoid

    Rapidoid

    Extremely Fast, Simple and Powerful Java Web Framework and HTTP Server

    Rapidoid is an extremely fast HTTP server and modern Java web framework / application container, with a strong focus on high productivity and high performance. Rapidoid is released under the liberal Apache Public License v2, so it is free to use for both commercial and non-commercial projects.
    Downloads: 0 This Week
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  • 14
    RcpFuse application framework or skeleton that integrates Java libraries to help you develop Rich applications quickly and efficiently. With similar design goals as AppFuse; and in fact the first version was an offshoot from AppFuse.
    Downloads: 0 This Week
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  • 15
    RePlugin

    RePlugin

    A flexible, stable, easy-to-use Android plug-in framework

    RePlugin is a complete Android plug-in solution which is suitable for general use. Apps do not need to be upgraded to support new components, even brand new plug-ins. With only ONE hook (ClassLoader), NO BINDER HOOK. RePlugin’s Crash ratio is as low as Ten thousandth (0.01%). In addition, RePlugin is compatible with almost ALL Android ROMs in the market. RePlugin supports almost all features seamlessly as an installed application, including static Receiver, Task-Affinity, user-defined Theme, AppCompat, DataBinding, etc. It takes only couple lines to access, whether plug-ins or main programs. RePlugin owns stable plug-in management solution which supports installation, upgrade, uninstallation and version management. Process communication, protocol versions and security check are also included. RePlugin possesses hundreds of millions users from 360 MobileSafe.
    Downloads: 0 This Week
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  • 16
    ReSpecT
    ReSpecT (Reaction Specification Tuples) is a logic-based language for distributed system coordination. ReSpecT is based on a coordination model exploiting tuple centres as first-class, general-purpose coordination media.
    Downloads: 0 This Week
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  • 17
    RealPeer is a Java framework for the simulation-based development of P2P systems. Utilising this framework a developer can build a P2P application that can be both: executed as a simulation model and as a real P2P application on a real network.
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  • 18
    The Realeyes IDS captures and analyzes full sessions. The graphical user interface will display both halves of captured sessions to determine what occurred. The GUI also provides management of application users, sensors, and the database.
    Downloads: 0 This Week
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  • 19
    Red Chili Recipe Manager
    Downloads: 0 This Week
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  • 20
    RedRoo implements a framework for defining and executing hierarchical state machines. As a Red Kangaroo jumps from place to place, RedRoo will transition your application from state to state feeding on the events you pass to it. So get jumping!
    Downloads: 0 This Week
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  • 21
    Redimensionador de imagens Vip
    Com esse sistema você consegue colocar marca d'agua e redimensionar várias imagens ao mesmo tempo!
    Downloads: 0 This Week
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  • 22

    Redlab Tools

    Redlab Tools, a collection of Java things

    Redlab Tools is a collection of Java utilities and small framework created either for fun, or because there is/was a need for something like it.
    Downloads: 0 This Week
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  • 23
    Reflexive provides a clean way to handle string literals, by dynamically resolving properties and methods.
    Downloads: 0 This Week
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  • 24
    A framework to support construction of application specific query solutions. The framework offers simple objects and possibilities for extension to support easy development and expansion of an application query component whose end result is SQL.
    Downloads: 0 This Week
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  • 25
    Remote Invocation Framework (RIF) is a framework for RMI that is 100% dynamic and uses WS over HTTP and HTTPS for brokering. Finally a framework exists to enable RMI with less that 6 lines of code including both the client & server side.
    Downloads: 0 This Week
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