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.

  • 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.
    Try It Free
  • $300 Free Credits for Your Google Cloud Projects Icon
    $300 Free Credits for Your Google Cloud Projects

    Start building on Google Cloud with $300 in free credits. No commitment, no credit card required until you're ready to scale.

    Launch your next project with $300 in free Google Cloud credits—no strings attached. Test, build, and deploy without risk. Use your credits across the entire Google Cloud platform to find what works best for your needs. After your credits are used, continue with always-free tier services. Only pay when you're ready to scale. Sign up in minutes and start exploring.
    Start Free Trial
  • 1
    JWare/AntXtras is a powerful extension Ant library as well as a collection of useful Ant components. The current active AntXtras projects include "AntXtras", "Log4Ant", and "Svn4Ant".
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    JaDiMa (Java Distributed Machine} is a collaborative platform to construct high performance distributed java applications on grid platforms. It is a system that automatically and transparently manages the remote libraries used in a java application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    A simple addon to Ant program - it listens on build events and notifies given Jabber user on "build started" and "build finished" events. Required: Ant 1.7, Java 1.5.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    Jacn is a Java-based configuration system for the SpringFramework. It also features a simple and effective web specific declarative JSF scoping mechanism that matches that of Spring Web Flow and Shale.
    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
    Provide a plugabble and configurable alternative to UNIX tools like grep, awk, tail, head, cut, sort, uniq or even some perl based scripts in a Java environment. A bit like what Apache Ant means to good old make.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    Projects for Maven2 Plugins using Java 5 syntax of generics, and mvn-anno-mojo project for Mojo Annotations. Features like, Ant to Maven integraton, easy Mojo to POJO delegations, project renaming, multi artifacts per POM, Idea, Native migration.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    Jalopy is a source code formatter/beautifier/pretty printer for the Java programming language. It is aimed to provide a full-featured, yet free alternative to the well-known Jindent. Plug-ins for Ant, Eclipse, IDEA, JBuilder, JDeveloper, jEdit, NetBeans.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    This is a simple NetBeans plugin which allow to use the jalopy code formatter from the NetBeans 5.5 IDE.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    JamaicaSql
    Jamaica is a simple and light but powerful utility to execute sql statements, scripts etc. written entierly in java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Fully Managed MySQL, PostgreSQL, and SQL Server Icon
    Fully Managed MySQL, PostgreSQL, and SQL Server

    Automatic backups, patching, replication, and failover. Focus on your app, not your database.

    Cloud SQL handles your database ops end to end, so you can focus on your app.
    Try Free
  • 10
    JammedUp (short for: JAM and JAD Update) is an automated MIDP and DoJa descriptor file synchronizer. MIDlets are separated into a JAR executable file and the descriptor file, a brief but accurate description of the JAR file's contents prior to download.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Jamocha is an open source rule engine. The objective of Jamocha is to provide a high quality rule engine and expert system shell environment. We would provide you an engine, the required development tools and a best practice methodology.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    The purpose of Jane is to provide a library for analyzing Java constructs. The current practice when writing Java tools has been to modify the Java grammer file for a particular compiler compiler to suit the needs of a particular tool. Jane is a layer
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Janel is a free, Open Source Java native executable and launcher for Windows. Launch your Java application just like other Windows executables. Within the configuration file set the location of the JVM, any of the Java system properties such as classpath, and more. A choice of non-console and console applications is available. The process name is whatever you choose for your .exe file. Also includes the ability to use the Janel executable as a Windows service. Janel was created and maintained by Tim Kil. It is no longer under active development. Many thanks to all the contributors over the years! Anil Guntur, Steve Crook, Bruce Cowan, Gregory Payne, Alexander Eckert, Oliver Lingg, Michael Knigge, John Stroy, and Humphrey Clerx
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Japano is a java-servlet based webapplication toolkit and engine. It offers easy website logic and HTML form creation and offers integration of dynamic javascript updates ( AJAX). A sample webapp makes it easy to start developing with japano.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    JarPlug is a Java Archive editor plugin for Eclipse 3.0. JarPlug adds an archive editing view to your Eclipse perspectives, and allows the individual entries in the archive to be edited or deleted before doing an update. Say goodbye to File Explorer!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    An Apache Ant task extending JSmooth that creates a Windows executable wrapper .exe file from a java archive .jar file without needing a separate xml configuration file.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    An extension to the JUnit 3.2 testing package (www.junit.org) to create a dynamic test suite from the manifest of a jar file. This will prevent the manual maintenance of a test suite inside of the main() method of a class.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Application for searching classpath dependencies of source code. Sometimes you do not know, which common libraries you need to compile existing java source code including transitive dependencies.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Jarpend is a tool to create jar-files containing all Java classes required by a given set of classes. It also allows you to test whether a certain classpath fulfills the dependencies of a class. Use it to make the NoClassDefFoundError extinct.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Jarrut
    Jarrut is a tool that makes developing and debugging Java ME applications (application using CLDC to be more specific) a bit less of a pain. Jarrut enables proper stack traces for exceptions, also when running a MIDlet on a real device
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    Jarsafe is a utility that provides prevents Java programs from being decompiled by encrypting the Java program using a key in a license.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    JarwiseDataAdapter

    JarwiseDataAdapter

    DataAdapter - Java library to work with Oracle and PostgreSQL database

    DataAdapter - Java library to work with Oracle and PostgreSQL database. This library simplifies the work of loading, creating or editing database data, as opposed to working directly with JDBC. In a few lines of code, you get objects relay database table with fields. Object Types fields correspond to types of database table fields. Here you will find similarities with familiar to you ActiveRecord.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Java IDE, project support, build, debugger, grep.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24

    Java Application Framework For All

    JAFFA is a Rich Web 2.0 POJO based Event-Driven SOA framework

    An Enterprise Focused Java Framework For Rapid Application Development. JAFFA is a Java web application development stack, build around Web 2.0 technologies (ExtJS, DWR, JAWR) with an extensive service architecture, meta-data layer and rules engine (based on JBoss AOP and Drools). It provides an event driven SOA infrastructure with advanced scheduling and queue sub-systems
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    Java n-tier Framework and GUI Screen builder/designer, supporting 1, 2 and 3 tier mixed architectures to databases, application servers or local persistent data in files. Extensive documentation including launching from a Web Server.
    Downloads: 0 This Week
    Last Update:
    See Project