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

  • Find Hidden Risks in Windows Task Scheduler Icon
    Find Hidden Risks in Windows Task Scheduler

    Free diagnostic script reveals configuration issues, error patterns, and security risks. Instant HTML report.

    Windows Task Scheduler might be hiding critical failures. Download the free JAMS diagnostic tool to uncover problems before they impact production—get a color-coded risk report with clear remediation steps in minutes.
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  • Enterprise-grade ITSM, for every business Icon
    Enterprise-grade ITSM, for every business

    Give your IT, operations, and business teams the ability to deliver exceptional services—without the complexity.

    Freshservice is an intuitive, AI-powered platform that helps IT, operations, and business teams deliver exceptional service without the usual complexity. Automate repetitive tasks, resolve issues faster, and provide seamless support across the organization. From managing incidents and assets to driving smarter decisions, Freshservice makes it easy to stay efficient and scale with confidence.
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  • 1
    Distributed logging service for JADE agent framework, utilizing features of Log4j and Chainsaw projects.
    Downloads: 2 This Week
    Last Update:
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  • 2
    log4sql support logging all SQL without source change. You will know pleasure in developing. I'm sure!.
    Downloads: 2 This Week
    Last Update:
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  • 3
    How Good are your JUnit Tests? NoUnit measures your Junit tests in your project using Java, XML and XSLT. NoUnit gives a picture of your code , like a graph gives you a picture of a set of figures, to allow you to see what is *really* going on.
    Downloads: 2 This Week
    Last Update:
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  • 4
    A complete Parallax Propeller debugger/simulator for development of assembler code, with built-in editor and compiler. In runs under Java v1.5 or better.
    Downloads: 2 This Week
    Last Update:
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  • 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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  • 5
    GNUDE is a complete suite of GNU C, C++, Fortran, and Java Cross Compilers, and the GDB CPU Simulator and Debugger for embedded microprocessor applications development. Targets development for ARM7, ARM9, and XScale applications.
    Downloads: 1 This Week
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  • 6
    BugTraking is a Bugzilla like project. Written in Java.
    Downloads: 1 This Week
    Last Update:
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  • 7
    Bugkilla is a set of java tools for the functional test of J2EE Web Applications. Specification and execution of tests will be automated for web front end and business logic layer. One goal is to integrate with existing frameworks and tools.
    Downloads: 1 This Week
    Last Update:
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  • 8
    Java Class and Byte Code verifier. Verifies static class file structure, external references, analyzes operand stack and local variables through byte code execution emulation. Includes CLDC standard verfication.
    Downloads: 1 This Week
    Last Update:
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  • 9
    Code Red Sim

    Code Red Sim

    A low-power ISA design and simulator for a 2010 IEEE competition

    This is a student project designed to compete in the 2010 IEEE Computer Society Student Competition: http://www.computer.org/portal/web/competition/2010competition The Code Red architecture is designed for extremely lower power environments, like distributed sensor networks. Included is a design of that architecture, a Java-based simulator, an implementation (without vector instructions) designed as a Logisim circuit (http://ozark.hendrix.edu/~burch/logisim/), and more. The name "Code Red" comes from our team name, the Red Team. Since the competition dictated a small team size, our professor split the class and gave each group a color. We liked the name "Code Red" and chose it to represent our team and school's color (UMass' official color is Maroon.) Only later did we realize that "Code Red" was the name of an unrelated computer worm from 2001.
    Downloads: 1 This Week
    Last Update:
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  • Desktop and Mobile Device Management Software Icon
    Desktop and Mobile Device Management Software

    It's a modern take on desktop management that can be scaled as per organizational needs.

    Desktop Central is a unified endpoint management (UEM) solution that helps in managing servers, laptops, desktops, smartphones, and tablets from a central location.
    Learn More
  • 10
    Concutest is a collection of tools designed to make the development and testing of concurrent Java programs easier and more reliable. Concutest is available under the BSD License and under active development by the JavaPLT group at Rice University.
    Downloads: 1 This Week
    Last Update:
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  • 11
    A java class assambler. This program assembles java byte code instructions for the JVM, like MASM for the CPU. Knowledge of the java byte code instruction is strongly required.
    Downloads: 1 This Week
    Last Update:
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  • 12
    KBOX is a MVC model2 frame work. It helps you create an extensible development environment for your application, based on published standards and proven design patterns.
    Downloads: 1 This Week
    Last Update:
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  • 13
    Plugins for Maven 1.x (http://maven.apache.org/maven-1.x/) - manage all aspects of your project (tests, docs, distribution) from a single project descriptor! This project provides plugins that are not bundled with Maven due to differing licenses.
    Downloads: 1 This Week
    Last Update:
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  • 14
    NetworkTools has 2 components: A protocol analyzer which plays a TCP client or server or pipeline, which sits between a client and server and shows how they communicate. A port scanner can scan a range of IP addresses and ports. See screenshots.
    Downloads: 1 This Week
    Last Update:
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  • 15
    Introspect on running programme, view and alter object fields and methods. Edit the code of any method at runtime; apply the changes to any combination of objects, such as an array, or a complete class. Complete rewrite underway available Jan 2007.
    Downloads: 1 This Week
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  • 16
    Xun Bug

    Xun Bug

    A tool can debug and profile javascript in multi mobile browsers

    Xun Bug is an application for debug and profiling javascript code. It is a powerful tool supports most of mobile browser such as iPhone,Android,BlackBerry,Windows Mobile and Symbian. There is no need to install plugins in your browser. With the debug tool of Xun bug,you can set breakpoint,watch call stacks,step and resume,watch expressions and so on. With the profile tool of Xun bug, you can get the javascript function call tree and every call's time ,you can also get the statistic of function calls.
    Downloads: 1 This Week
    Last Update:
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  • 17
    The beSee-2-x architecture brings JVM wide instrumentation for AOP systems, independant from bytecode kit (BCEL, Javassist). A plugin is provided to instrument BEA WebLogic (v7) for tracing purpose (servlet->EJB->CMP->DB), with full JMX capabilities.
    Downloads: 1 This Week
    Last Update:
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  • 18
    AG101 is a java-based visual XSL editor/debugger built on the Pollo XML editor (pollo.sourceforge.net). It has extensions to a regular expression library. It also has the ability to pipe XSL transforms one to another and store and reuse those pipes.
    Downloads: 0 This Week
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  • 19
    ALF, The Automated Logging Framework, is a native logging framework for Java with the unique advantage of supporting automated method tracing. This platform-independent library allows developers to debug their applications quickly without adding code
    Downloads: 0 This Week
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  • 20
    A suite of Java ClassLoaders that use "load-time reflection" (the modification of bytecodes upon class loading) to extend existing Java classes. It uses the excellent BCEL library (http://bcel.sf.net).
    Downloads: 0 This Week
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  • 21
    ASGMemProf is an exact, bytecode instrumenting memory profiler for Java EE, relying on a novel scheme - memory accounts.
    Downloads: 0 This Week
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  • 22

    ASTRA Agent Programming Language

    ASTRA is an implementation of AgentSpeak(TR)

    ASTRA is an implementation of AgentSpeak(TR) that has built in support for the CArTaGo and EIS environment models. Support for conversation management is provided in the form of the ACRE conversation manager.
    Downloads: 0 This Week
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  • 23
    ATmon is a bootloader and monitor tool for the Atmel ATmega32 microcontroller.
    Downloads: 0 This Week
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  • 24
    AlgoExplorer is a dynamic data structures viewer for Java. It allows the visualization of data structure of a Java program, allowing you to see how objects, handled by the algorithms, interact with each other and how they are related and linked. The project has been moved on: http://code.google.com/p/algoexplorer/
    Downloads: 0 This Week
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  • 25
    It is a Process Monitoring Toolkit with the ability of Extend. E.g. You can use it to monitor a specified process. And set a triger like (over 50MB mem use) then do something like (report to DB).
    Downloads: 0 This Week
    Last Update:
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