Open Source Java Apps for Android

Browse free open source Java Apps for Android and projects below. Use the toggles on the left to filter open source Java Apps for Android 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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  • Context for your AI agents Icon
    Context for your AI agents

    Crawl websites, sync to vector databases, and power RAG applications. Pre-built integrations for LLM pipelines and AI assistants.

    Build data pipelines that feed your AI models and agents without managing infrastructure. Crawl any website, transform content, and push directly to your preferred vector store. Use 10,000+ tools for RAG applications, AI assistants, and real-time knowledge bases. Monitor site changes, trigger workflows on new data, and keep your AIs fed with fresh, structured information. Cloud-native, API-first, and free to start until you need to scale.
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  • 1
    Xiaomi.eu Multilang MIUI ROMs

    Xiaomi.eu Multilang MIUI ROMs

    OFFICIAL mirror of MIUI Multilang ROM by https://xiaomi.eu/

    Included languages: English (en.miui.com, xiaomi.eu) Chinese (miui.com) Polish (Acid, miuipolska.pl) Slovak (ingbrzy, https://miuios.cz) Czech (VMach, https://miuios.cz) Bulgarian (Global) Hungarian (vagyula, miui.hu) French (Global) Swedish (Global) Russian (Global) Ukrainian (Global) Belorussian (Global) Croatian (Masva, MIUI Adria) Vietnamese (Belmont-Gabriel) Italian (miui.it) Greek (Global) Norwegian (Global) Dutch (cueie, mannyribo, redmaner) Spanish (nosijf982) Turkish (suatsari) Brazilian-Portuguese (Global, Feurrado, Lobianco) Portuguese (KcNirvana, Lippe35) Hebrew (Global) Romanian (ashtefan) German (muhamed89, cp82, dahool2016, and more) Catalan (deivids84) Korean (cjhyuky, bradly1, xiaomiqm) Slovenian (bostjan2016) Serbian (dudjaa) Thai (Global) Finnish (dogiex) Arabic (Global) Japanese (ScratchBuild) Burmese (Global) Danish (Global)
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    Downloads: 16,896 This Week
    Last Update:
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  • 2
    Arrow OS

    Arrow OS

    It is an AOSP based project with an aim of keeping things clean!

    ArrowOS is an AOSP based open source project started with the aim of keeping things simple, clean and neat, both for the Android system and users. We understand the pain of unnecessary and sometimes rarely used mods/features being shipped with custom roms nowadays which may end up causing battery drains and/or memory leaks. This is being strictly avoided on our side keeping everything to a bare minimum, delivering the stable performance all the time without destroying the AOSP interface. With users getting more used to tweaks and features, we added just the right stuff that will be actually USEFUL at the end of the day.
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    Downloads: 964 This Week
    Last Update:
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  • 3
    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: 596 This Week
    Last Update:
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  • 4
    FrostWire

    FrostWire

    Search, Download, Play, Share on Bittorrent and the cloud

    FrostWire https://www.frostwire.com/ is a media player, Video Downloader and Peer to Peer (P2P) information sharing client for the BitTorrent network. This project is not affiliated with LimeWire LLC. FrostWires' source code is Licensed under the GNU GPL and Apache Open Source licenses. System Requirements Any of the following operating systems: ● Windows 10, 8, 7, Vista for Intel processors (64-bit only) ● Mac OS X 10.11 (El Capitan) or later (64-bit) ● Linux, Unix such as Solaris (64-bit) ● Android 7.0 or later 256 MB of RAM (512 MB Recommended) An active internet connection
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    Downloads: 356 This Week
    Last Update:
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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.
    Learn More
  • 5
    Domination (Risk Board Game)

    Domination (Risk Board Game)

    Domination is a game that is a bit like the board game Risk

    Domination is a game that is a bit like the well known board game of Risk or RisiKo. It has many game options and includes many maps. Written in java it includes a map editor, a simple map format, multiplayer network play, single player, hotseat, 5 user interfaces and many more features, it works in all OSs that run java 1.5 or higher, iOS and Android.
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    Downloads: 209 This Week
    Last Update:
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  • 6
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    Downloads: 173 This Week
    Last Update:
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  • 7
    Octavi-OS

    Octavi-OS

    fast mirror online soon

    An AOSP based custom rom with new look and feel and massive customisations , contains everything you need .
    Downloads: 93 This Week
    Last Update:
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  • 8
    DictionaryForMIDs

    DictionaryForMIDs

    Dictionary for Mobile Information Devices and PCs

    DictionaryForMIDs is an dictionary application for cell phones, tablets and PCs. The dictionary is completely installed on the device ("offline dictionary"), i.e. after installation there is no need for an internet connection. DictionaryForMIDs can be set up for any dictionary, for any language, or for any other lookup-purpose. The DfM-Creator tool is used to set up a dictionary for use with DictionaryForMIDs.
    Downloads: 36 This Week
    Last Update:
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  • 9
    OpenRocket
    An Open Source model rocket simulator.
    Downloads: 17 This Week
    Last Update:
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  • Leverage AI to Automate Medical Coding Icon
    Leverage AI to Automate Medical Coding

    Medical Coding Solution

    As a healthcare provider, you should be paid promptly for the services you provide to patients. Slow, inefficient, and error-prone manual coding keeps you from the financial peace you deserve. XpertDox’s autonomous coding solution accelerates the revenue cycle so you can focus on providing great healthcare.
    Learn More
  • 10
    GpsMid
    Java Midlet to use OpenStreetMap data on a J2ME ready Mobile. Displays a moving map using external or internal GPS, shows the street name on which you are. There is Navigation support for car drivers, bicyclists and pedestrians plus many more ...
    Downloads: 7 This Week
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  • 11
    Bluetooth GPS for Android

    Bluetooth GPS for Android

    An application for using an external bluetooth GPS on Android devices

    An application for using an external bluetooth GPS on Android devices. The application connects to a Bluetooth device (NMEA GPS) and creates a GPS provider which can be used to replace the internal GPS.
    Downloads: 6 This Week
    Last Update:
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  • 12
    Neighbor from Hell remake

    Neighbor from Hell remake

    Переделка игры "Как достать соседа"

    Переделка игры "Как достать соседа"
    Downloads: 13 This Week
    Last Update:
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  • 13
    MeanOS

    MeanOS

    The smallest and the most powerful operating system.

    The first decentralized, artificially intelligent, MEAN.js stack, operating system. Mean OS is the only operating system hosted anonymous using a P2P network and a suite of non-standard in-browser delivery mechanisms. Mean OS is specifically designed to support both Brave and Tor but is compatible with all other major browsers. Mean OS is Proud to be a BRAVE and TOR supporter, be free!!
    Downloads: 6 This Week
    Last Update:
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  • 14
    GOdroid is an Android application to play the strategic board game Go against the GPL Go engine GNU Go. It contains a Go board UI and minor changes to GNU Go. This site contains the sources for the UI and the (few) changes to the GNU Go sources. Translations contributed by - Chinese: Jean Lea and Kid Wong - Russian: Шмойлов Валерий - Danish and Norwegian: Michael Berthelsen - Polish: Piotr Goliasz - Finnish: Daniel Landau - Romanian: Mircea Damian - Spanish: Pol Urós Guardiola - Portuguese (Brazil): Igor Costa - Italian: Alessio Gerola - Hungarian: Téglás Zoltán, review: András Oláh - French: Laurent L Volunteers for providing additional translations are very welcome - it's easy, just fill out a google docs/drive spreadsheet.
    Downloads: 3 This Week
    Last Update:
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  • 15
    openCRX - Enterprise Class CRM

    openCRX - Enterprise Class CRM

    professional CRM and groupware service, ready for the cloud

    openCRX moved to https://github.com/opencrx
    Downloads: 1 This Week
    Last Update:
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  • 16
    xpd-ebike

    xpd-ebike

    Infineon e-bike controller setup tool

    XPD (stands for "eXtended Parameter Designer") is an alternative to "KeyWin e-Bike Lab Parameter Designer" software used to program the so-called "Infineon" e-bike controllers. * It provides some additional features missing in the original program, and is generally easier to use. * It is opensource so you can learn how it works and add unique features to it or customize to suit your own needs. * It is cross-platform: works on Linux, Windows and Android.
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    Downloads: 4 This Week
    Last Update:
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  • 17
    AL-IV

    AL-IV

    ALFOUR Programming language. Simple, safe, power, multi-platform.

    A programming language AL-IV (ALFOUR) is a high-level imperative object oriented programming language with minimal introduction level, easy porting to any platform claiming a very high level of safety and stability, with a controllable level of code protection, high efficiency of an executable code, full independence from a target platform, minimal enter level.
    Downloads: 2 This Week
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  • 18
    AndroidRate

    AndroidRate

    Library to help you promote your Android app

    AndroidRate is a library to help you promote your Android app by prompting users to rate the app after using it for a few days.
    Downloads: 1 This Week
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  • 19
    RobBX

    RobBX

    RobBX - is a powerfull DIY Arduino constructor based from IQBX

    RobBX - is a first in the world DIY Arduino constructor based from IQBX. Difference from prototype, RobBX has complete conception witch includes: a complete STL 3D-models with OpenSCAD sources; a special schemes and electronics connections; and powerfull Arduino firmware for ESP32 based on WiFi AP Server, connection to it from mobile device give a controller, programmable from IDE (on Blockly). Robb - is a low cost constructor, but it powerful for STEAM education.
    Downloads: 1 This Week
    Last Update:
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  • 20
    ebizframe ERP

    ebizframe ERP

    Transform Your Business with ebizframe ERP

    ebizframe ERP is a full-feature ERP which has been implemented for 1,100+ clients in 25 countries across 20+ industry verticals. It is a Future-Ready modularERP with a very short implementation cycle. It can be quickly configured for almost any industry vertical. ebizframe is a Device-Agnostic, Multi-Everything ERP solution which offers the flexibility to be deployed securely On-Cloud or On-Premise. ebizframe ERP is an Easy-to-Use ERP System which features User-Defined Dashboards, Flexible Workflows and a great User Interface (UI).
    Downloads: 1 This Week
    Last Update:
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  • 21

    webfolder

    Remote web interfaced file manager

    Remote web interfaced file manager capable to run anywhere including Android and BlackBerry devices. Easy intuitive interface and powerful files management capabilities.
    Downloads: 1 This Week
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  • 22

    Astronomy calculations testing

    Astronomy calculations

    Some astronomy calculations testing
    Downloads: 0 This Week
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  • 23
    Buwlink

    Buwlink

    Buwlink is a remote control for Windows with your Android device.

    The Buwlink is the perfect companion to increase your productivity. Whether in the field of artistic development or other video game programming edition... There are often keyboard shortcuts to know. now to represent your shortcuts and other features on the icons appearance. Easy to use easy to remember Buwlink. PLEASE NOTE: Please download the windows version and the android version. Connect the two versions on the same wifi network configure the two software so that they can communicate.
    Downloads: 0 This Week
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  • 24
    Calculation of shifts for Android
    The program can expect for any date the state of changing (work/day off) for the different types of non-standard office hours, as that: three in three days (bar, shop) days through three (guard) day, night, two days off (port) Creation of description of other office hours is possible, it is possible to set seven shifts of different duration. GNU General Public License
    Downloads: 0 This Week
    Last Update:
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  • 25
    Calculation of shifts for pub 317

    Calculation of shifts for pub 317

    Can be calculated for any date in the changeable (work - output)

    The program can be calculated for any date in the changeable (work - output) for bartenders pub "317" (Illichivsk, Ukraine).
    Downloads: 0 This Week
    Last Update:
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