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
  • Cut Data Warehouse Costs up to 54% with BigQuery Icon
    Cut Data Warehouse Costs up to 54% with BigQuery

    Migrate from Snowflake, Databricks, or Redshift with free migration tools. Exabyte scale without the Exabyte price.

    BigQuery delivers up to 54% lower TCO than cloud alternatives. Migrate from legacy or competing warehouses using free BigQuery Migration Service with automated SQL translation. Get serverless scale with no infrastructure to manage, compressed storage, and flexible pricing—pay per query or commit for deeper discounts. New customers get $300 in free credit.
    Try BigQuery Free
  • 1
    XmlHttpLib(XHL) is a pure java developers library and cmd line tool for executing http requests with xml-input(, converting response html to xhtml) and transforming it with xslt to grab information from webpages.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    Xorio is a Java Based Framework for the creation of Dynamic Websites and Web-Applications. It has a "Stuctured Content Enginge" that allows to handel complex structured Content without new Databse Structures and with no or not very much Programming.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    XpressRoad™ is an open source framework that allows developers to speed development of web based application. It provides the most easily configurable, customizable and innovative business object development base on the open source framework.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    A Java collections framework based on set theory, specifically, from Spivey's work on the Z notation (a formal specification language).
    Downloads: 0 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
  • 5
    Yet Another Component Meta Model Framework. Similar to the Java reflection API, but generic so it can be used with different implementations, and then be used by various Services like Editors, Constraint-Checkers, Bindings, Persistence, and Transaction.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    "Yet Another Do-It-Yourself (Test) Automation Framework" specification. Use or modify one of the existing software implementations (hosted/referenced here), or implement the framework yourself. Download and read the spec for more details.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    YAFF (Yet Another Factory Framework)

    YAFF (Yet Another Factory Framework)

    A Powerful Java Factory Framework

    A Powerful Java Factory Framework
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    YOPS (Ye Olde Photo Shoppe) is a media manipulation framework written in Java. Computer science educators use this framework to help novices learn and practice fundamental programming concepts by having them create tools for their own photoshop-like app.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    YUI4JSF is a custom component library for JavaServer Faces allowing the usage of Yahoo UI widgets as JSF custom components.
    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

    Yacap

    Yet Another Command Argument Parser

    A highly configurable command line parser with help generation support. * Easy to configure option sets based on builder patterns * Typed options: boolean, string, int, long, double and enum * Dual POSIX short and GNU long parameter names * Support for unnamed (such as file list after options) and internal options (options are unparsed after --) * One step parsing * Result set with safe and typed getters * Error messages and warnings returned by result set * Text-based help generation, unix-like structure * Highly configurable, formatted output
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Yahjf is Yet Another Html Java Framework. If your app generates HTML you can use Yahjf to turn your HTML code into objects that you can store (in session,on disk,etc) and modify programmatically. More infos in forum and on website.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    YahooCSV Framework, is a Java library that allows fast, cached, read access to historical financial data from Yahoo!. The intention of this framework is to be injected via Spring into other applications for high volume read access via Ehcache.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13

    YahooFinance API

    [DEPRECATED] Yahoo finance API is shut down by Yahoo!

    Get stock quotes, historical data and exchange rates from Yahoo!Finance using a Java API. [DEPRECATED] Yahoo finance API is shut down by Yahoo!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Yakizu is a set of loosely connected Java components, currently including a Java web framework and simple language implemented using ANTLR.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    Presentation framework for Echo2 web-based GUI apps. Currently pre-alpha but compiles OK. Provides elementary support for Actions, Presentation Models and simple events. Windowing support is planned. Download the code from CVS and ge involved today!!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    A micro IOC (Inversion of Control) container that is absolutely non-intrusive to components and with no restriction on injection method. (be it constructor-based, java bean setter based, static method based, etc).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17

    YellowArrow

    Java WebFramework

    Webframework based on the ideas of Struts2 but with possible no xml configurations but only annotations. Decorating and adding 'data' and 'services' to the action classes through interceptors.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Yet Another Java Framework is a modern, component-based framework for rapid Web programming in Java with strong separation of presentation, logic and business/database layers.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Yasja provides small, targeted sample applications to help developers learn new frameworks and techniques.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Yet Another Swing Library (YASL) is a library for Java developers containing Swing components, utilities, and a framework for Swing applications.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Yet Another Validator is a lightweight Java validation tool. It applies validations directly on domain models. It is annotation driven - no XML, framework independent. Has two converters - SpringMVC and Struts2, is JSR-303 NON complaint, so no bloatware.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Ykran is a framework to define syntaxes of Domain Specific Language (DSL) in simple XML documents. Provides a Syntax driven Web based editor to compose the rules in DSL and a translation framework to translate the rules to target environment. I later tho
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23

    Yuzz Web Framework

    Yuzz NoSQL Compile-Time Checked HTML Web Framework

    Strong Typed HTML/XML Web framework and embedded database for Java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    ZK Unit extends JUnit to test your ZK project: ZUL pages, composers, event handlers, constraints and more. Use ZKUnit for test driven development, to achieve code coverage and integration with a continous build system.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    ZappWeb aims to provide a you a framework to start building secure Ajax-based web applications. It's based on the following web frameworks: Spring, Spring security and Zkoss.
    Downloads: 0 This Week
    Last Update:
    See Project
MongoDB Logo MongoDB