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.

  • 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.
    Start Free
  • Run Any Workload on Compute Engine VMs Icon
    Run Any Workload on Compute Engine VMs

    From dev environments to AI training, choose preset or custom VMs with 1–96 vCPUs and industry-leading 99.95% uptime SLA.

    Compute Engine delivers high-performance virtual machines for web apps, databases, containers, and AI workloads. Choose from general-purpose, compute-optimized, or GPU/TPU-accelerated machine types—or build custom VMs to match your exact specs. With live migration and automatic failover, your workloads stay online. New customers get $300 in free credits.
    Try Compute Engine
  • 1
    PHP Work is a rapid application-framework-level modules management framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    PHP/j - PHP style in Java
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    PHPRPC is a Remote Procedure Calling (RPC) protocol that works over the Internet. It is secure and fast. It has a smaller overhead. It is powerful and easy to use. This project is the client and server implementations of the PHPRPC.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    A J2ME and J2SE Java library for building distributed ubiquitous computing applications, supporting various devices, sensors and actuator hardware. The conceptual model behind it focuses on making the whole system understandable by an end-user.
    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
  • 5
    Objetivo de disseminar conhecimentos das diversas áreas de saber que envolvem o desenvolvimento de jogos independente de plataforma. The objective to spread diverse knowledge of areas to know that to involve the independent development of platform games
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    The Pacific Northwest (PNW) SOA Commons (pnwsoacommons) is an Open Source project to collect, organize, build, and share reusable artifacts and best practices to help facilitate the faster adoption and implementation of SOA best practices.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    POJOsync is an easy to use Java Framework to synchronize plain old java objects (POJO) with other users.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Core frameworks (persistence, security, i18n, configuration, etc) used by both Easy RIA for GWT and Open Enrollment LMS projects
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    PROCOL space-based framework for multi-core. Based on LighTS (http://lights.sourceforge.net/). More to come soon ...
    Downloads: 0 This Week
    Last Update:
    See Project
  • Managed MySQL, PostgreSQL, and SQL Databases on Google Cloud Icon
    Managed MySQL, PostgreSQL, and SQL Databases on Google Cloud

    Get back to your application and leave the database to us. Cloud SQL automatically handles backups, replication, and scaling.

    Cloud SQL is a fully managed relational database for MySQL, PostgreSQL, and SQL Server. We handle patching, backups, replication, encryption, and failover—so you can focus on your app. Migrate from on-prem or other clouds with free Database Migration Service. IDC found customers achieved 246% ROI. New customers get $300 in credits plus a 30-day free trial.
    Try Cloud SQL Free
  • 10
    Unit test framework for PegaRULES Process Commander applications. PRUnit is based on the xUnit family of testing frameworks. PRUnit is downloaded as a Zip file that can be uploaded to your PRPC system and loaded into the rule base.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    The PSWF (Paul Smits Web Framework) is a experimental web framework project.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Famework to persist an EMF object-graph remotely. It uses a SDO DataGraph over SOAP. It has a Hibernate based mediator to communicate with a RDBMS. In a intranet environment Eclipse RCP + this framework can form an alternative for RIA's.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    OSGi frameworks. r3 | r4 | r4.1 | r4.2
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Parallelizable is a tiny framework in complement for java.util.conccurent api. Parallelizable is an abstract class to extend for making asynchronous parallel execution on a synchronous task. Very usefull if task often calls a very long process.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15

    Parameterized Unit Test Framework

    PUT extension for JUnit 4

    Parameterized Unit Test Framework is an open-sourced PUT library for JUnit 4. This project is developed in my spare time and currently updated actively. Core features: 1. Separation of test data from test code 2. Annotation support 3. Automated test parameter injection 4. Dedicated test runner
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    A framework for creating online parking services built over PowerPark Classic, supporting permit and citation payments, appeal filing and status check, online permit printing, vehicle registrations, and online account monitoring and maintenance services.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Parsec provides a JSP 1.2 tag library and an API for developing rich web applications. MVC is supported with the Page Controller pattern, where requests go to JSPs; no XML config files. Client-side form validation supported by JavaScript code generation.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    PRE4J (Partial RDF Encryption API for Jena) is a lightweight API for encrypting selected RDF graph elements. PRE4J provides cryptographic extensions to the Jena Semantic Web Framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19

    PasteControl

    This is a pure JAVA API to handle paste image and upload it

    Accessing clipboard is nothing very new in HTML 5. Gone are the days to print the screen of your computer, save it and upload it t server via File Up-loader. We , instead, experience the richness of the web by simply pasting our content on the web page itself. A very good example of the same may be experienced when you paste a screen shot on Github web itself . This project encourages developers to have such facility in the simple Java web application they develop. It's assumed that these developers are not using JSF Vaadin or ZK- any RIA framework already providing a component for uploading your clipboard content . This API is for those who use vanilla Servlet /JSP with some client side framework like Angular JS and Bootstrap , for example. The target beneficiary of this project are those who restrict server side to Vanilla Servlet /JSP and might come across such need often.For them, this API is good with regard to simplicity and over-head. Plus, YOU NEED NOT CODE at all.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Various tools for integrating your Website with PayPal's Payment Services. Check out http://sourceforge.net/projects/javacommerce.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Pease Plate is a small but powerful template engine for Java that uses simple POJOs as data model. It includes an extendable Java-like expression language designed for the special needs of template rendering.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    An API for documents: think Doxia with compile time validation of your document structure.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    PeerKit is a tool for rapidly creating new peer-to-peer programs, and designing and evaluating new peer-to-peer topologies.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    PeerSE is a graphical experiment environment for analysing and developing peer-to-peer (p2p) systems in Java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    PeerVibes is a framework for creating applications based on peer-to-peer networks. This framework provides the necessary tools and architecture to build complex applications such as collaborative work support and distributed backup.
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB
Gen AI apps are built with MongoDB Atlas
Atlas offers built-in vector search and global availability across 125+ regions. Start building AI apps faster, all in one place.
Try Free →