Open Source Java Software

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

  • Our Free Plans just got better! | Auth0 Icon
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  • Atera all-in-one platform IT management software with AI agents Icon
    Atera all-in-one platform IT management software with AI agents

    Ideal for internal IT departments or managed service providers (MSPs)

    Atera’s AI agents don’t just assist, they act. From detection to resolution, they handle incidents and requests instantly, taking your IT management from automated to autonomous.
    Learn More
  • 1
    Cool Reader

    Cool Reader

    A cross-platform XML/CSS based eBook reader

    CoolReader is fast and small cross-platform XML/CSS based eBook reader for desktops and handheld devices. Supported formats: FB2, TXT, RTF, DOC, TCR, HTML, EPUB, CHM, PDB, MOBI. Platforms: Win32, Linux, Android. Ported on some eInk based devices.
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    Downloads: 573 This Week
    Last Update:
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  • 2
    ASAP - Another Slight Atari Player
    ASAP (Another Slight Atari Player) plays and converts 8-bit Atari music (*.sap, *.cmc, *.mpt, *.rmt, *.tmc, ...) on modern computers and mobile devices.
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    Downloads: 43 This Week
    Last Update:
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  • 3
    GPS Datalogger Device Control
    i-Blue 747 / i-Blue 757 / Qstarz BT-Q1000 / i.Trek Z1 / Konet BGL-32 / Holux M-241 / ... control SW (for Java Phones, PalmOS, WinCe (PPC), Java platforms, Windows, Linux, and MacOS). Compatible with most MTK GPS Chipset based loggers.
    Downloads: 30 This Week
    Last Update:
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  • 4
    BlueCove is a JSR-82 implementation on Java Standard Edition (J2SE) on BlueZ Linux, Mac OS X, WIDCOMM, BlueSoleil and Microsoft Bluetooth stack on WinXPsp2 and newer. Originally developed by Intel Research and currently maintained by volunteers.
    Downloads: 21 This Week
    Last Update:
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  • Automate contact and company data extraction Icon
    Automate contact and company data extraction

    Build lead generation pipelines that pull emails, phone numbers, and company details from directories, maps, social platforms. Full API access.

    Generate leads at scale without building or maintaining scrapers. Use 10,000+ ready-made tools that handle authentication, pagination, and anti-bot protection. Pull data from business directories, social profiles, and public sources, then export to your CRM or database via API. Schedule recurring extractions, enrich existing datasets, and integrate with your workflows.
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  • 5
    db4o is the world's leading open source object database for Java and .NET. Leverage fast native object persistence, ACID transactions, query-by-example, S.O.D.A object query API, automatic class schema evolution, small size (http://developer.db4o.com)
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    Downloads: 21 This Week
    Last Update:
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  • 6
    openBmap

    openBmap

    a free and open map of wireless communicating objects

    openBmap collects data and provides open maps and statistics of all communicating objects: cellular antennas, wifi hotspots. All softwares from back-end to client are open-source under AGPL v3 license.
    Downloads: 4 This Week
    Last Update:
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  • 7
    WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice
    Downloads: 5 This Week
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  • 8
    An application to provide a worldwide mobile secure/confidential payment system over the internet and other kinds of insecure/unreliable networks
    Downloads: 5 This Week
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  • 9
    jTarot is a tarot personal advisor. jTarot will do a "reading" for you when you need advice. A reading displays a number of cards and then describes what these cards mean. You take the reading and apply the meanings of the cards to your situation.
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    Downloads: 1 This Week
    Last Update:
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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.
    Learn More
  • 10
    OpenDMTP is a protocol/framework that allows communications with small devices (mobile phones, PDA's, and other high-latency/low-bandwidth devices), especially geared towards the transmission of GPS, temperature, and other remote monitoring information.
    Downloads: 1 This Week
    Last Update:
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  • 11
    Speech and Debate Timekeeper
    Timer for speech and debate competitions. Keeps track of speech order, time limits, and prep time for various debate formats (Policy, LD, Parliamentary, Public Forum, etc.) and individual events. Gives verbal and visual time signals.
    Downloads: 1 This Week
    Last Update:
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  • 12
    A C#, C++, Delphi, ActiveX ,javascript and Java trace framework and a trace viewer: Tail, outputDebugString, event log, Log4J, Log4Net, Microsoft EIF support and Pocket PC development (C++ and .NET)
    Downloads: 1 This Week
    Last Update:
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  • 13
    Thank You for Visiting the AOL Open Mobile Platform Site. OMP 1.0 is now available for download! Open Mobile Platform is an open source mobile application development platform that supports Windows Mobile, Java, BREW, Symbian and Linux platforms. You can
    Downloads: 0 This Week
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  • 14
    Web, Wap & iMode Java J2SE/J2EE Lightweight Framework and Tools
    Downloads: 0 This Week
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  • 15
    BITXml is an open xml based protocol for Machine to Machine communications. BITXml is both language and "transport" agnostic and covers all the requirements of a generic M2M telemetry & control application. For more info www.bitxml.org
    Downloads: 0 This Week
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  • 16
    Business Nomade is a tool to help people working abroad to deal with their daily administration work
    Downloads: 0 This Week
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  • 17
    ContextBlogger is a service-oriented architecture created for contextualised learning.
    Downloads: 0 This Week
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  • 18
    DazioAES is a password manager: it's an application protected by a single password that stores multiple other password or informations in an encrypted way. It uses Bouncycastle crypto library (classes from) and their AES encryption implementation.
    Downloads: 0 This Week
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  • 19
    DungaSync is an effort to create a generic architecture to synchronize data over a wide range of formats and data sources. It it not bound to a certain platform, its concept allows the adaptation to any datasource. NOTE: DEVELOPMENT STOPPED! 12/2001 CS
    Downloads: 0 This Week
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  • 20
    Do you pay for ring tones on your cellphone? Well the idea here is to make a web based application for all platforms that can be used to upload your own music and convert it from .mp3 format to ring tone format and send it to your phone in a text message
    Downloads: 0 This Week
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  • 21
    It is a sofware to admin al things about a sportive club, from the trainig to the economy. The first step will take care of individual sports: athletics and cycling. Later we will support team sports like football, basket, handball or rugby.
    Downloads: 0 This Week
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  • 22
    HELEN 3 Tools
    HELEN is a flexible framework to support the computer-based management of Clinical Practice Guidelines (CPG). It covers the whole life-cycle of a guideline, providing methods and tools for each step (from development to clinical use).
    Downloads: 0 This Week
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  • 23
    JBTWatch is a Java Library used to communicate with Bluetooth Watches such as Sony Ericsson MBW-100 or MBW-150. It uses BlueCove to communicate and is responsible to handle the AT commands send from and to the watch.
    Downloads: 0 This Week
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  • 24
    Java Tiny Gfx Library (JTGL) is a graphic fundation framework (a graphics/gaming api) that will allow easy deployment/porting of applications/games on many environments: J2SE,J2ME/MIDP(Nokia,Siemens,BlackBerry),SuperWaba(Palm,PPC,Symbian),ExEn,DoJa,etc..
    Downloads: 0 This Week
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  • 25
    JaguiD is a Java GUI for DOS. It consists of several sub-projects including a Java Compiler, a Class Runner and a Jar Packager. JaguiD has limited Java support to provide a Graphical User Interface for DOS and compatibles.
    Downloads: 0 This Week
    Last Update:
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