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.

  • 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.
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  • Orchestrate Your AI Agents with Zenflow Icon
    Orchestrate Your AI Agents with Zenflow

    The multi-agent workflow engine for modern teams. Zenflow executes coding, testing, and verification with deep repo awareness

    Zenflow orchestrates AI agents like a real engineering system. With parallel execution, spec-driven workflows, and deep multi-repo understanding, agents plan, implement, test, and verify end-to-end. Upgrade to AI workflows that work the way your team does.
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  • 1

    MinGW - Minimalist GNU for Windows

    A native Windows port of the GNU Compiler Collection (GCC)

    MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.
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    Downloads: 2,693,918 This Week
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  • 2
    A home for additional useful tasks and types for Ant (http://ant.apache.org).
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    Downloads: 1,519 This Week
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  • 3
    JAGS is Just Another Gibbs Sampler. It is a program for the statistical analysis of Bayesian hierarchical models by Markov Chain Monte Carlo.
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    Downloads: 1,061 This Week
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  • 4
    Apktool

    Apktool

    A tool for reverse engineering Android apk files

    A tool for reverse engineering 3rd party, closed, binary Android apps. It can decode resources to nearly original form and rebuild them after making some modifications. It also makes working with an app easier because of the project like file structure and automation of some repetitive tasks like building apk, etc. It is NOT intended for piracy and other non-legal uses. It could be used for localizing, adding some features or support for custom platforms, analyzing applications and much more. The decode option on Apktool can be invoked either from d or decode. In order to run a rebuilt application. You must resign the application. Android documentation can help with this. As you probably know, Android apps utilize code and resources that are found on the Android OS itself. These are known as framework resources and Apktool relies on these to properly decode and build apks.
    Downloads: 135 This Week
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  • Grafana: The open and composable observability platform Icon
    Grafana: The open and composable observability platform

    Faster answers, predictable costs, and no lock-in built by the team helping to make observability accessible to anyone.

    Grafana is the open source analytics & monitoring solution for every database.
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  • 5
    Launch4j Executable Wrapper
    Cross-platform Java executable wrapper for creating lightweight Windows native EXEs. Provides advanced JRE search, application startup configuration and better user experience.
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    Downloads: 3,020 This Week
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  • 6
    Bazel

    Bazel

    Fast, scalable, multi-language and extensible build system

    Build and test software of any size, quickly and reliably. Bazel only rebuilds what is necessary. With advanced local and distributed caching, optimized dependency analysis and parallel execution, you get fast and incremental builds. Build and test Java, C++, Android, iOS, Go and a wide variety of other language platforms. Bazel runs on Windows, macOS, and Linux. Bazel helps you scale your organization, codebase and Continuous Integration system. It handles codebases of any size, in multiple repositories or a huge monorepo. Easily add support for new languages and platforms with Bazel's familiar extension language. Share and re-use language rules written by the growing Bazel community. Bazel is the common build tool throughout Pinterest and has been instrumental in achieving fast, reproducible builds across our programming languages and platforms.
    Downloads: 102 This Week
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  • 7
    capacitor

    capacitor

    Build cross-platform native progressive web apps for iOS and Android

    Capacitor is an open source native runtime for building Web Native apps. Create cross-platform iOS, Android, and Progressive Web Apps with JavaScript, HTML, and CSS. Capacitor’s native plugin APIs make it extremely easy to access and invoke common device functionality across multiple platforms. Build web-based applications that run equally well across iOS, Android, and as Progressive Web Apps. Access the full Native SDKs on each platform, and easily deploy to the App Stores (and the web). Add custom native functionality with a simple Plugin API, or use existing Cordova plugins with our compatibility layer. Capture images, save photos, and configure hardware parameters like saturation and color balance. Save and read documents, assets, and other content your users need to access via native file systems. Gather critical information about a user’s device location, such as latitude and longitude.
    Downloads: 21 This Week
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  • 8
    JSmooth creates standard Windows executable files (.exe) that smartly launch java applications. It makes java deployment much smoother and user-friendly, as it is able to find and run Java VMs by itself, or help the user get one if none are available.
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    Downloads: 82 This Week
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  • 9
    DEPRECATED > GNU ARM Eclipse

    DEPRECATED > GNU ARM Eclipse

    A family of Eclipse CDT extensions and tools for GNU ARM development.

    These plug-ins provide build and debug extensions for Eclipse CDT (C/C++ Development Tools) for 32/64-bits GNU ARM toolchains like GNU Tools for Embedded, Linaro, etc, ready to run STM32Fx project templates and full integration for advanced J-Link JTAG/SWD probes, including SWO tracing console and peripheral registers view.
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    Downloads: 54 This Week
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  • Payments you can rely on to run smarter. Icon
    Payments you can rely on to run smarter.

    Never miss a sale. Square payment processing serves customers better with tools and integrations that make work more efficient.

    Accept payments at your counter or on the go. It’s easy to get started. Try the Square POS app on your phone or pick from a range of hardworking hardware.
    Learn More
  • 10
    ProGuard Java Optimizer and Obfuscator

    ProGuard Java Optimizer and Obfuscator

    Java class file shrinker, optimizer, obfuscator, and preverifier

    ProGuard has moved to Github now: https://github.com/Guardsquare/proguard ProGuard is a free Java class file shrinker, optimizer, obfuscator, and preverifier. It detects and removes unused classes, fields, methods, and attributes. It optimizes bytecode and removes unused instructions. It renames the remaining classes, fields, and methods using short meaningless names. ProGuard is useful for making code more compact and more efficient, on the desktop, on tablets, on smartphones, and on embedded devices. It also makes code more difficult to reverse engineer.
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    Downloads: 51 This Week
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  • 11
    Command-line/Ant-task/embeddable text file preprocessor. Macros, flow control, expressions. Recursive directory processing. Extensible in Java to display data from any data sources (as database). Can generate complete homepages (tree of HTML-s, images, etc.)
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    Downloads: 83 This Week
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  • 12
    SMC - The State Machine Compiler

    SMC - The State Machine Compiler

    Translates state machine into a target programming language.

    SMC takes a state machine stored in a .sm file and generates a State pattern in 14 programming languages. Includes: default transitions, transition args, transition guards, push/pop transitions and Entry/Exit actions. See User Manual for more info.
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    Downloads: 29 This Week
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  • 13
    SDK Manager

    SDK Manager

    Manager for the Android SDK, wraps 'sdkmanager' and 'avdmanager'.

    Manager for the Android SDK, wraps 'sdkmanager', 'avdmanager' and 'emulator'. Packages: List, install, uninstall and update packages. Option to choose Channel. AVDs: Create, list and start AVDs. Many options to launch. After you check "Accept licenses" it will automatically accept them.
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    Downloads: 112 This Week
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  • 14
    Keytool is an Eclipse plugin that maintains keystores and certificates. It allows you to create certificates and put them in a keystore. You can from Eclipse, open and inspect certificates that are stored as .cer, or in a given keystore.
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    Downloads: 31 This Week
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  • 15
    Jib

    Jib

    Containerize your Java application

    Containerize your Java application with Jib! Jib builds optimized Docker and OCI images for your Java applications-- no Docker daemon or deep mastery of Docker best-practices required. Jib builds by separating the traditionally single image layer Java application into multiple layers for more granular incremental builds. This results in only changes to your code being rebuilt, not your entire application. Jib deploys your changes fast and allows you to rebuild your container image exactly the same without triggering unnecessary updates. All this done completely daemonless, reducing your CLI dependencies.
    Downloads: 3 This Week
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  • 16

    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: 17 This Week
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  • 17
    AVR Plugin for Eclipse
    AVR-Eclipse is a plugin for the Eclipse IDE which adds toolchain support, through CDT, for the gcc compiler for the Atmel AVR series of microcontrollers, and adds a toolbar button to allow quick upload of produced code to a target device.
    Downloads: 14 This Week
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  • 18
    AWS SDK for Java

    AWS SDK for Java

    The official AWS SDK for Java 1.x (In Maintenance Mode

    The AWS SDK for Java v1 is the long-standing, feature-complete toolkit for calling AWS services from Java applications. It provides service clients for nearly the entire AWS surface area, handling request signing, retries, pagination, and error translation so you can focus on business logic. The SDK offers both synchronous and asynchronous clients and integrates with popular HTTP stacks, credential providers, and logging frameworks. Its data models map directly to service APIs, making it straightforward to construct requests and parse responses. Extensive configuration options let you tune connection pools, timeouts, retry policies, and regional behavior for production workloads. Although superseded by v2 for new projects, v1 remains widely used in mature systems due to its broad coverage and stability.
    Downloads: 2 This Week
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  • 19
    Buck

    Buck

    Build system that encourages the creation of small, reusable modules

    Buck is a build system developed and used by Facebook. It encourages the creation of small, reusable modules consisting of code and resources, and supports a variety of languages on many platforms. Buck builds independent artifacts in parallel to take advantage of multiple cores on your machine. Further, it reduces incremental build times by keeping track of unchanged modules so that the minimal set of modules is rebuilt. Buck only uses the declared inputs, which means everybody gets the same results. Buck looks at the contents of your inputs, not their timestamps to figure out what needs to be built. As a result, incremental builds should always be correct, so there's no need to perform a clean build. With buck query, you can better understand your dependencies and what is required to build your product. With buck project, your project can be better understood by your IDE, making you and your team more productive.
    Downloads: 2 This Week
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  • 20
    picocli

    picocli

    Framework for building GraalVM-enabled command line apps

    Picocli is a one-file framework for creating Java command-line applications with almost zero code. It supports a variety of command-line syntax styles including POSIX, GNU, MS-DOS and more. It generates highly customizable usage help messages that use ANSI colors and styles to contrast important elements and reduce the cognitive load on the user. Picocli-based applications can have command line TAB completion showing available options, option parameters, and subcommands, for any level of nested subcommands. Picocli-based applications can be ahead-of-time compiled to a GraalVM native image, with extremely fast startup time and lower memory requirements, which can be distributed as a single executable file. Picocli generates beautiful documentation for your application (HTML, PDF and Unix man pages). Another distinguishing feature of picocli is how it aims to let users run picocli-based applications without requiring picocli as an external dependency.
    Downloads: 2 This Week
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  • 21
    Source Navigator NG is a source code analysis tool. With it, you can edit your source code, display relationships between classes and functions and members, and display call trees. You can navigate your source code and easily get to declarations or implementations of functions, variables and macros (commonly called "symbols") which helps you discovering and mapping unknown source code for enhancement or maintenance tasks.
    Downloads: 9 This Week
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  • 22
    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: 8 This Week
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  • 23
    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: 11 This Week
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  • 24
    Eclipse Plug-In for deploying a project into one "fat" executable jar file containing all referenced libraries. References are taken from the project settings, so no manual configuration is necessary.
    Downloads: 6 This Week
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  • 25
    SyncLite

    SyncLite

    Build Anything Sync Anywhere

    SyncLite is an open-source, low-code, comprehensive relational data consolidation platform enabling developers to rapidly build data-intensive applications for edge, desktop and mobile environments. SyncLite enables real-time, transactional data replication and consolidation from various sources including edge/desktop applications using popular embedded databases (SQLite, DuckDB, Apache Derby, H2, HyperSQL), data streaming applications, IoT message brokers, traditional database systems(ETL) and more into a diverse array of databases, data warehouses, and data lakes, enabling AI and ML use-cases at all three levels: Edge, Fog and Cloud. SyncLite's novel CDC replication framework for embedded databases, is designed to assist developers in rapidly building general-purpose data-intensive applications, Gen AI Search/RAG applications for edge, desktop, and mobile environments. It seamlessly integrates with embedded databases like SQLite, DuckDB, Apache Derby, H2, and HyperSQL(HSQLDB).
    Downloads: 1 This Week
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