Open Source Kotlin Software

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

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  • 1
    v2rayNG

    v2rayNG

    A V2Ray client for Android, support Xray core and v2fly core

    A V2Ray client for Android supports Xray core and v2fly core. geoip.dat and geosite.dat files are in Android/data/com.v2ray.ang/files/assets (path may differ on some Android devices). Download feature will get an enhanced version in this repo (Note it need a working proxy). The latest official domain list and ip list can be imported manually. It's possible to use third-party dat files in the same folder, like h2y. Android projects under V2rayNG folder can be compiled directly in Android Studio or using Gradle wrapper. But the v2ray core inside the aar is (probably) outdated. The aar can be compiled from the Golang project under AndroidLibV2rayLite folder. v2rayNG can run on Android Emulators. But VPN mode will not work if the system doesn't support it.
    Downloads: 1,197 This Week
    Last Update:
    See Project
  • 2
    Kotatsu

    Kotatsu

    Manga reader for Android

    Kotatsu is an open-source manga reader for Android that supports local file reading and integration with sources via Tachiyomi extensions. It offers a sleek UI, smooth reading experience, and the ability to import downloaded manga from various sources. Kotatsu is designed for offline reading and emphasizes customization and privacy.
    Downloads: 762 This Week
    Last Update:
    See Project
  • 3
    Google AI Edge Gallery

    Google AI Edge Gallery

    A gallery that showcases on-device ML/GenAI use cases

    Gallery is a curated collection of on-device machine learning examples, demo apps, and model artifacts designed to help developers experiment with and deploy ML at the edge. The project bundles runnable samples that show how to run TensorFlow Lite/Edge TPU models (and similar lightweight runtimes) on mobile and embedded platforms, demonstrating common tasks like image classification, object detection, audio recognition, and pose estimation. Each sample is intended to be both a learning aid and a practical starting point: code is organized to show model loading, pre/post-processing, performance measurement, and common optimization knobs (quantization, NNAPI/Delegate usage, and hardware accelerators). The repo also collects small, well-documented models and conversion scripts so developers can reproduce a pipeline from a full-size model down to a device-friendly artifact.
    Downloads: 669 This Week
    Last Update:
    See Project
  • 4
    Magisk

    Magisk

    Suite of open source tools for customizing Android

    Magisk is a suite of tools intended for Android customization, and supports devices higher than Android 4.2. Some elements of Android customization are root, boot scripts, SELinux patches, AVB2.0 / dm-verity / forceencrypt removals, etc. Some of the most important features of Magisk are that it provides root access to your device and it modifies read-only partitions when installing modules. Also, you can hide Magisk from root detections / system integrity checks. Magisk comes with a huge collections of tools for installation, daemons, and utilities for developers. Magisk contains MagiskSU, Magisk Modules and MagiskHide features.
    Downloads: 428 This Week
    Last Update:
    See Project
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  • 5
    Clash Meta for Android

    Clash Meta for Android

    A rule-based tunnel for Android

    Clash Meta for Android is an Android application that functions as a rule-based network tunneling and proxy management tool, enabling users to control how their internet traffic is routed through different proxy servers. Built on the Clash.Meta core, it allows advanced routing based on customizable rules, making it possible to selectively direct traffic for specific apps, domains, or regions. The application is commonly used for bypassing network restrictions, optimizing routing performance, and managing multiple proxy configurations in a unified interface. It provides a user-friendly mobile interface while maintaining powerful underlying functionality for advanced users who need granular control over network behavior. The project is actively maintained and integrates updates from the Clash.Meta kernel, ensuring compatibility with evolving proxy protocols and features. It supports various proxy types and configurations, making it highly flexible for different networking scenarios.
    Downloads: 280 This Week
    Last Update:
    See Project
  • 6
    ShizuTools

    ShizuTools

    Contains many tools to control android system via shizuku

    ShizuTools is an Android utility suite that leverages elevated system access via Shizuku to provide controls that normally require ADB, root, or OEM-only privileges. Instead of being a single-purpose app, it bundles several focused tools under one umbrella, making it easier to apply advanced tweaks without constantly switching apps or writing commands by hand. A major use case is system app management, where the Debloater tool helps uninstall or disable preinstalled components and surfaces app information to guide safer decisions. It also includes tools that change day-to-day behavior, like enforcing picture-in-picture for apps that don’t expose it, enabling multiple audio streams at once, and giving per-app audio controls beyond what Android typically allows. For power users and automation fans, it offers shells that can execute raw ADB-style commands directly, including an intent-driven mode designed to be triggered by automation apps like Tasker or MacroDroid.
    Downloads: 275 This Week
    Last Update:
    See Project
  • 7
    Seal

    Seal

    Video/Audio Downloader for Android, based on yt-dlp

    Video/Audio Downloader for Android. Download videos and audio files from video platforms supported by yt-dlp (formerly youtube-dl). UI and logic written with pure Kotlin. Single activity, no fragments, only composable destinations.
    Downloads: 201 This Week
    Last Update:
    See Project
  • 8
    NekoBox for Android

    NekoBox for Android

    NekoBox for Android / sing-box / universal proxy toolchain for Android

    NekoBoxForAndroid is an Android-based proxy client supporting popular protocols like V2Ray, XRay, and Shadowsocks for secure, privacy-focused internet access. Designed as a modern alternative to applications like V2rayNG, it provides a clean interface, enhanced performance, and robust configuration management for circumventing censorship and accessing restricted content.
    Downloads: 185 This Week
    Last Update:
    See Project
  • 9
    SimpMusic

    SimpMusic

    A simple music app using YouTube Music for backend

    A simple music app using YouTube Music for the backend.
    Downloads: 163 This Week
    Last Update:
    See Project
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  • 10
    Tachiyomi

    Tachiyomi

    Free and open source manga reader for Android

    Tachiyomi is a free and open source manga reader for Android 6.0 and above. Online and offline reading from hundred of different sources. Automatically keep track of your manga with MyAnimeList, AniList, Kitsu, Shikimori, and Bangumi. A configurable reader with multiple reading modes, custom color filters, and other settings. A configurable reader with multiple viewers, reading directions and other settings. Tracker support, MyAnimeList, AniList, Kitsu, Shikimori, and Bangumi. Create backups locally to read offline or to your desired cloud service.
    Downloads: 161 This Week
    Last Update:
    See Project
  • 11
    ReVanced Patches

    ReVanced Patches

    Patches for ReVanced

    Patches are small modifications to Android apps that allow you to change the behavior of or add new features, block ads, customize the appearance, and much more.
    Downloads: 159 This Week
    Last Update:
    See Project
  • 12
    Hacker Scripts

    Hacker Scripts

    Based on a true story

    Hacker Scripts is a cheeky collection of small automation scripts and language ports collected under the tagline “Based on a true story.” The repository gathers playful utilities (originally shell and Ruby scripts) that automate short, real-world tasks — for example, sending a quick “late at work” text when SSH sessions are active, firing off an automated “I’m sick / working from home” email on certain mornings, or even talking to a networked coffee machine to start brewing at precisely the right moment. The README explains the origin story and highlights several canonical scripts and provides usage notes such as required environment variables and cron examples for scheduling. Contributors have provided implementations and ports in many languages and folders (shell, Ruby, Python, Node, Perl, PowerShell, Go, Java, etc.), and the project explicitly welcomes pull requests that add additional language implementations.
    Downloads: 149 This Week
    Last Update:
    See Project
  • 13
    InnerTune

    InnerTune

    A Material 3 YouTube Music client for Android

    A Material 3 YouTube Music client for Android.
    Downloads: 129 This Week
    Last Update:
    See Project
  • 14
    EhViewer

    EhViewer

    EhViewer overhauled with Material Design 3, Jetpack Compose and more

    EhViewer fork is dedicated to lightweight and high-performance.
    Downloads: 126 This Week
    Last Update:
    See Project
  • 15
    LTECleanerFOSS

    LTECleanerFOSS

    The last Android cleaner you'll ever need

    Android API 23+ (Marshmallow) no longer allows apps to clean other app's caches, thus the claim of cleaners clearing them is completely false. The only thing they can clean: log files, temporary files, and empty folders. LTE Cleaner is %100 free, open source, ad-free, and deletes everything it claims too.
    Downloads: 117 This Week
    Last Update:
    See Project
  • 16
    AB Download Manager

    AB Download Manager

    A Download Manager that speeds up your downloads

    AB Download Manager is an Android library that provides reliable and resumable download capabilities for applications. It supports multi-threaded downloads, progress tracking, and background tasks, making it ideal for apps that require robust file transfer features. The library is built for easy integration and performance on Android devices.
    Downloads: 108 This Week
    Last Update:
    See Project
  • 17
    CloudStream

    CloudStream

    Android app for streaming and downloading media

    Android app for streaming and downloading media.
    Downloads: 108 This Week
    Last Update:
    See Project
  • 18
    YTDLnis

    YTDLnis

    Android Video/Audio Downloader app using yt-dlp

    YTDLnis is a free and open source video/audio downloader using yt-dlp for Android 6.0 and above.
    Downloads: 96 This Week
    Last Update:
    See Project
  • 19
    Lemuroid

    Lemuroid

    All in one emulator on Android!

    Lemuroid is an open-source emulator based on Libretro. It's designed to work on a wide range of devices, from phones to TVs, and to provide the best user experience on Android. It's completely free and without ads. Keep in mind not every device can emulate every console. A very powerful one is required for more recent systems such as PSP and DS and 3DS. This application does not contain any games. You need to provide your own legally owned ROM files. It originated from a rib of Retrograde, but graduated to a standalone project integrating LibretroDroid.
    Downloads: 90 This Week
    Last Update:
    See Project
  • 20
    Suwayomi-Server

    Suwayomi-Server

    A rewrite of Tachiyomi for the Desktop

    A free and open source manga reader server that runs extensions built for Tachiyomi. Suwayomi is an independent Tachiyomi compatible software and is not a Fork of Tachiyomi. Suwayomi-Server is as multi-platform as you can get. Any platform that runs java and/or has a modern browser can run it. This includes Windows, Linux, macOS, chrome OS, etc. Follow Downloading and Running the app for installation instructions.
    Downloads: 90 This Week
    Last Update:
    See Project
  • 21
    Kotlin

    Kotlin

    The Kotlin programming language

    It is an open-source, statically typed programming language supported and developed by JetBrains and open-source contributors. Support for multiplatform programming is one of Kotlin’s key benefits. It reduces time spent writing and maintaining the same code for different platforms while retaining the flexibility and benefits of native programming. Kotlin plugin is intended to work with several recent versions of IntelliJ IDEA and Android Studio. Each platform is allowed to have a different set of features and might provide a slightly different API. Instead of using several parallel Git branches, the project stores everything in a single branch, but files may have counterparts with version extensions (*.as32, *.172, *.181). The primary file is expected to be replaced with its counterpart when targeting a non-default platform.
    Downloads: 88 This Week
    Last Update:
    See Project
  • 22
    ViMusic

    ViMusic

    An Android application for streaming music from YouTube Music

    ViMusic is an open-source Android music streaming application that plays content directly from YouTube Music without displaying ads. It focuses on a clean UI and user experience while offering features like playlists, local caching, lyrics, and dark mode. ViMusic is designed for privacy-conscious users who want a lightweight alternative to official streaming apps.
    Downloads: 82 This Week
    Last Update:
    See Project
  • 23
    Mihon

    Mihon

    Free and open source manga reader for Android

    Mihon is a full-featured, open-source manga and comic reader app for Android designed to make discovering and reading manga, webtoons, and comics easy and customizable on mobile devices. Built as a community-driven successor to apps like Tachiyomi, Mihon combines a rich set of reading tools with a clean, user-friendly interface that supports local content as well as integrations with popular tracking services such as MyAnimeList, AniList, Kitsu, MangaUpdates, Shikimori, and Bangumi. It allows customization of viewing modes, reading directions, and themes so users can tailor the reading experience to their preferences, while offering category organization and library management to keep collections structured. Mihon can schedule updates for series, keeps track of chapters read or unread, and offers local backups and offline reading options so users aren’t dependent on constant internet access.
    Downloads: 81 This Week
    Last Update:
    See Project
  • 24
    Auxio

    Auxio

    A simple, rational music player for Android

    Auxio is a local music player with a fast, reliable UI/UX without the many useless features present in other music players. Built off of modern media playback libraries, Auxio has superior library support and listening quality compared to other apps that use outdated android functionality. In short, It plays music. The default branch is the development version of the repository. For a stable version, see the master branch.
    Downloads: 76 This Week
    Last Update:
    See Project
  • 25
    Dantotsu

    Dantotsu

    Anilist client based on Saikou

    An open-source mobile application for Anilist enthusiasts, inspired by Saikou and enhanced with Tachi/Aniyomi extensions. Dantotsu is designed for anime and manga enthusiasts who want to catch up on their favorite series. It's a user-friendly app that lets you enjoy your "favorite" anime and manga on the go. With integrated Anilist support, you can easily track your progress and stay up to date with what your friends are watching and reading. Say goodbye to the hassle of opening a browser to search for your favorite anime or manga. Dantotsu, a versatile client built upon Anilist & Tachi/Aniyomi. You can have Aniwave for anime watching and Mangadex for reading manga, which puts everything you need right at your fingertips. There's no need to leave the app; just install it, and everything you love magically appears when you're ready to explore and discover new content.
    Downloads: 76 This Week
    Last Update:
    See Project
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