Browse free open source Java Build Tools and projects below. Use the toggles on the left to filter open source Java Build Tools by OS, license, language, programming language, and project status.

  • $300 Free Credits for Your Google Cloud Projects Icon
    $300 Free Credits for Your Google Cloud Projects

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    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
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  • 1
    DEP4E

    DEP4E

    DocBook Editing and Processing for Eclipse

    DEP4E integrates DocBook XML and DocBook XSL into Eclipse IDE to create, edit and process DocBook projects.
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    Downloads: 16 This Week
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  • 2
    Apache Maven Surefire

    Apache Maven Surefire

    Apache Maven Surefire

    A Maven plugin designed to run tests, supporting unit tests and integration tests during the build process.
    Downloads: 1 This Week
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  • 3
    ChatGPT Java API

    ChatGPT Java API

    Java SDK for seamless integration with ChatGPT APIs

    ChatGPT-Java is a Java SDK created by PlexPt that offers a convenient, out-of-the-box integration with the OpenAI ChatGPT API (including models like GPT-4o, GPT-5) for Java applications. The library supports chat completions, token counting, function calls, streaming responses, proxy configuration, custom API host, and integration with frameworks such as Spring (via SseEmitter). It abstracts the HTTP interaction and JSON parsing into simple Java objects and builders while handling details like token usage and model selection. It is published to Maven Central under the group com.github.plexpt, e.g., version 5.0.1. The SDK is designed for developers building chatbots, conversational assistants, and integrations in Java or Spring ecosystems. Being open source under MIT, it provides transparency and community contributions.
    Downloads: 1 This Week
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  • 4
    Dropwizard

    Dropwizard

    Simple library for building production-ready RESTful web services

    Dropwizard is a Java framework for developing ops-friendly, high-performance, RESTful web services. Dropwizard pulls together stable, mature libraries from the Java ecosystem into a simple, light-weight package that lets you focus on getting things done. Dropwizard has out-of-the-box support for sophisticated configuration, application metrics, logging, operational tools, and much more, allowing you and your team to ship a production-quality web service in the shortest time possible. Dropwizard straddles the line between being a library and a framework. Its goal is to provide performant, reliable implementations of everything a production-ready web application needs. Because this functionality is extracted into a reusable library, your application remains lean and focused, reducing both time-to-market and maintenance burdens.
    Downloads: 1 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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  • 5
    Epoxy

    Epoxy

    Android library for building complex screens in a RecyclerView

    Epoxy is an Android library for building complex screens in a RecyclerView. Models are automatically generated from custom views or databinding layouts via annotation processing. These models are then used in an EpoxyController to declare what items to show in the RecyclerView. This abstracts the boilerplate of view holders, diffing items and binding payload changes, item types, item ids, span counts, and more, in order to simplify building screens with multiple view types. Additionally, Epoxy adds support for saving view state and automatic diffing of item changes. We developed Epoxy at Airbnb to simplify the process of working with RecyclerViews, and to add the missing functionality we needed. We now use Epoxy for most of the main screens in our app and it has improved our developer experience greatly. If you are using layout resources in Epoxy annotations then for library projects add Butterknife's gradle plugin to your buildscript.
    Downloads: 1 This Week
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  • 6
    Cruisecontrol Config and Monitor Tool
    A rich client application for configuring and monitoring Cruisecontrol server(s).
    Downloads: 26 This Week
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  • 7
    FOPPS (feature oriented software product planning system) is a tool to help you to design your software product line. It provides different views (project plan, feature tree, ...) to maintain your core assets and applications.
    Downloads: 24 This Week
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  • 8
    This framework is a release notes framework that enables to generate textual release notes from an XML file. This is an open framework that enables to integrate outer information (VSC, bug tracking). Stand-alone GUI and Eclipse integration is on march.
    Downloads: 22 This Week
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  • 9
    This application uses the index facilities created with the JarIndexer to determine what dependencies a project needs based on the source code imports, spring configurations, etc.
    Downloads: 20 This Week
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  • 99.99% Uptime for MySQL and PostgreSQL Databases Icon
    99.99% Uptime for MySQL and PostgreSQL Databases

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  • 10
    OJ (f.a.k.a. OpenJava) is an object-oriented macro system with a compile time metaobject protocol for Java.
    Downloads: 17 This Week
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  • 11
    QALab collects and consolidates data from several QA tools, like pmd, checkstyle, FindBugs, Cobertura and Simian and keeps track of them overtime. This allows developers,architects and project managers alike to be presented with a trend of the project QA
    Downloads: 15 This Week
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  • 12

    APKRepatcher

    APKRepatcher helps you to modify an existing apk with simple GUI

    APKRepatcher helps you to modify an existing apk using a simple user friendly GUI. It lets you edit java/smali code from an APK and rewrite the changes back to the modified signed APK. Additionally, it provides you option to convert Dex, Jar, Class, Smali, Class from one format to another. APKRepatcher makes use of dex2jar, jadx, rsyantaxtextarea, zip4j, apktool
    Downloads: 8 This Week
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  • 13
    The LALR parser generator (LPG) is a tool for developing scanners and parsers written in Java, C++ or C. Input is specified by BNF rules. LPG supports backtracking (to resolve ambiguity), automatic AST generation and grammar inheritance.
    Downloads: 5 This Week
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  • 14
    AntAcid is a GUI front-end to Jakarta's ant build tool. Eliminates requirement to code directly in XML. Context-menus direct the user to allowable selections of Tasks, nested Tasks and their respective attributes. Generates xml buildfiles.
    Downloads: 14 This Week
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  • 15
    A Java Utility to edit and create new game content for Might and Magic 8 with support for 6 and 7. This is an extension of the no-longer-developed UnLod java utility for MM8. MM8LevelEditor is no longer actively developed. A new MMLevelEditor is being re
    Downloads: 13 This Week
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  • 16
    A collection of useful Groovy additions including builders, extensions for Ant and XOM.
    Downloads: 13 This Week
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  • 17
    EasyStruts provide advanced support for developing Struts web applications with Eclipse . keywords: MVC, Struts, Eclipse, Java
    Downloads: 4 This Week
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  • 18
    One-JAR(TM)
    One-JAR(TM) is a simple solution to a vexing problem in Java: how to distribute an application as a single jar-file, when it depends on multiple other jar-files. One-JAR uses a custom classloader to discover library jar files inside the main jar.
    Downloads: 2 This Week
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  • 19

    XML Unit

    XMLUnit provides assertions that help testing code that produces XML.

    XMLUnit 2.x Development Moved to GitHub XMLUnit provides help with testing code that creates or consumes XML. XMLUNit 2.x is available for both Java and .NET with a similar API. Development of this version has moved to a GitHub organization[1] with two git repositories for Java and .NET respectively. All discussion about XMLUnit independent of any version will happen on the XMLUnit general mailing list[2]. XMLUnit for Java 1.x is no longer maintained, please use the legacy artifacts of XMLUnit 2.x if you still need APIs compatible with XMLUnit 1.x. We keep using the Sourceforge infrastructure that has served as well for many years to host forums and mailing lists. XMLUnit for .NET 0.x is not maintained any longer. [1] https://github.com/xmlunit [2] https://sourceforge.net/p/xmlunit/mailman/xmlunit-general/
    Downloads: 3 This Week
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  • 20
    An IDE for java source files. Support syntax highlighting, debugging and proejct mangement.
    Downloads: 6 This Week
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  • 21
    Convertigo

    Convertigo

    Low Code Platform for Enterprises

    Convertigo is an open source Low Code Application Platform (LCAP) featuring MXDP (Multi eXperience Development Platform) for full-stack mobile and web application development - Large variety of connectors to enterprise apps - Low Code microservice builder to orchestrate and combine data and processes from multiple enterprise apps. - Offline data and complete data synchronization for disconnected scenarios. - Cross-platform WebApp and Native app mobile application development tools for iOS, Android platforms - Security managers and Identity managers - Mobile application updates and administration - Monitoring and administration tools. Convertigo also features an RPA integration tool for legacy mainframe applications and Web html applications. Convertigo Community Edition is AGPL based.
    Downloads: 2 This Week
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  • 22
    xmltask provides the facility for automatically editing XML files as part of an Ant build. Unlike the standard filter task provided with Ant, it is XML-sensitive, but doesn't require you to define XSLTs.
    Downloads: 3 This Week
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  • 23
    REM is a NetBeans module for ZK application development. It can be used to create ZK web Applications, ZUL and ZScripi documents. It supports ZUL syntax highlighting, auto indent, code folding, code hyperlink navigation and code completion. It supports palette for some components.
    Downloads: 2 This Week
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  • 24
    JarBuilder is a useful tool for Java programmers. It allows one to easily create jar files. JarBuilder is written in Java providing a nice Swing GUI.
    Downloads: 10 This Week
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  • 25
    Scenery Manager provides a pratical way to build and test templates (jsp, velocity...). At same time, you define a solid contract between the interface (template) and the services (servlet) teams. It can be very useful on requirements closure, prototype
    Downloads: 9 This Week
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