Open Source Kotlin Software
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Kotlin Software
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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KernelSU
A Kernel based root solution for Android
KernelSU is a root solution for Android devices that operates at the kernel level, providing systemless root access with enhanced control and flexibility. Unlike traditional rooting methods, it integrates directly into the Linux kernel, allowing for deeper system modifications while maintaining stability. It supports module-based customization, enabling users to extend functionality without altering core system files. KernelSU also includes a permission management system that allows fine-grained control over root access for applications. The project is designed to be compatible with modern Android versions and focuses on security and performance. It is widely used by advanced users who want powerful customization capabilities. Overall, KernelSU redefines Android rooting by embedding control directly into the kernel layer. -
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Operit AI
Powerful Android AI agent with tools, automation, and Linux shell
Operit is a full-featured AI assistant and agent platform designed specifically for Android devices, aiming to go far beyond traditional chat-based interfaces. It integrates deep system-level capabilities with a wide range of tools, allowing the AI to perform real tasks such as file management, automation, and system control directly on the device. A standout aspect of the project is its built-in Ubuntu 24 environment, which enables users to run Linux commands, scripts, and development tools in a mobile context. Operit supports both local and remote AI models, including offline execution through frameworks like llama.cpp and MNN, helping preserve user privacy while maintaining flexibility. Operit also includes an intelligent memory system that stores, organizes, and retrieves user interactions to provide more personalized and context-aware responses. In addition, it offers workflow automation, plugin extensibility, & a rich tool ecosystem, making it suitable for advanced productivity. -
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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. -
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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. -
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TG WS Proxy Android
Android local MTProto proxy server to bypass Telegram loading issues
TG WS Proxy Android is an Android-based local MTProto proxy application designed to improve Telegram connectivity and bypass network restrictions using secure WebSocket connections. Built as a fork of Flowseal’s tg-ws-proxy project, the app routes Telegram traffic through Cloudflare WebSocket tunnels or directly to Telegram data centers for improved stability and performance. The application runs a local MTProto proxy powered by a native Go engine and integrates directly with compatible Telegram clients for quick setup. Designed with a modern Material 3 interface and Jetpack Compose, it provides an intuitive user experience alongside advanced networking features. TG WS Proxy Android also includes background service support, real-time connection logs, automatic updates, and customizable themes for better usability on mobile devices. -
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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. -
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Headunit Revived
Headunit App for displaying Android Auto
Headunit Revived is an Android application that turns an Android tablet or phone into an Android Auto receiver. It revives and continues the idea of the original open-source Headunit project. The app is useful for people who want to create a dedicated Android Auto display using existing Android hardware. It supports wired USB connections between a phone and the device running Headunit Revived. It also offers wireless connection options through a helper app, legacy launchers, manual setup, or Android intents for power users. Overall, it is a practical project for custom car setups, testing environments, and Android Auto experimentation. -
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Han1meViewer
Android client project for browsing and viewing videos
Han1meViewer is an Android client project for browsing and viewing Hanime-related video content. It is written for Android 7.0 and newer and is presented by the maintainer as a learning and code-exchange project rather than an officially supported distribution channel. The repository has been deprecated, and the maintainer states that it is no longer actively maintained. Its newer unfinished development branch can be used as a basis for further work by developers who want to study or fork the code. The project is most relevant as a reference for Android app architecture, media browsing, and third-party client design. Because it deals with adult content, it is only appropriate for adults and should be used with attention to local laws, platform rules, and content rights. -
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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. -
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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. -
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EhViewer
EhViewer overhauled with Material Design 3, Jetpack Compose and more
EhViewer fork is dedicated to lightweight and high-performance. -
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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. -
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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. -
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Animeko
100% Kotlin/Compose Multiplatform
Animeko is an open-source anime streaming app for Android, offering a modern and community-driven alternative for watching anime. It aggregates content from various public sources and supports multiple features to enhance the viewing experience, including subtitles, episode tracking, and source customization. -
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DroidDeck
DroidDeck brings the SteamOS experience to Android
DroidDeck is an Android gaming environment designed to bring a SteamOS-like experience to supported handheld devices. It runs Valve's Steam client in Big Picture mode and uses an ARM64 Proton environment to launch Windows games. The project targets Android 9 or newer devices with supported Qualcomm Adreno GPUs and does not require root. Optional desktop components add Linux applications, emulators, Flatpak software, and AppImage support. GOG, Epic Games, and Amazon Games libraries can also be imported as non-Steam titles for Proton launching. Its Linux runtime combines compatibility, audio, input, and graphics components into one handheld-focused environment. Hardware compatibility varies substantially, especially outside newer Adreno devices. -
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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. -
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WG Tunnel Desktop
A WireGuard and AmneziaWG client for desktop with a kill switch.
WG Tunnel Desktop is a free and open-source desktop client for managing WireGuard and AmneziaWG VPN tunnel configurations. It is designed for users who want a flexible desktop VPN tool with strong privacy controls and support for modern tunneling protocols. The application supports Windows and Linux, with macOS support planned for the future. WG Tunnel Desktop runs tunnels through a system daemon, allowing VPN connections to operate independently from the graphical interface. It includes security-focused tools such as an independent lockdown mode, encrypted configuration storage, and tunnel restoration on boot. With import, export, editing, sorting, and live statistics features, WG Tunnel Desktop provides a practical way to manage secure VPN connections on desktop systems. -
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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. -
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Spowlo
A Spotify songs downloader for Android made with Jetpack Compose
A Spotify songs downloader powered by spotDL made with Jetpack Compose and Material You. -
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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. -
21
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. -
22
SimpMusic
A simple music app using YouTube Music for backend
SimpMusic is a free and open-source music streaming application that uses YouTube Music as its primary backend and is available for Android and desktop platforms. Built with Compose Multiplatform, it provides access to music from YouTube Music and YouTube with background playback and an ad-free listening experience. The app combines music discovery, search, playlists, podcasts, charts, moods, genres, video playback, and personalized listening features in a unified interface. SimpMusic also offers advanced playback tools including a 10-band equalizer, AutoEQ headphone profiles, crossfade, audio effects, synchronized lyrics, and high-quality streams of up to 256 kbps for YouTube Music Premium users. Users can cache content for offline playback, import playlists from Spotify and other services, synchronize playlists with YouTube Music, and access features such as Android Auto and Last.fm scrobbling. -
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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. -
24
mpvExtended
A beautiful media player for android, based on mpv-android
mpvExtended is an open-source Android media player built on top of the powerful libmpv engine, designed to combine advanced playback capabilities with a modern and intuitive user interface. It leverages Jetpack Compose and Material3 design principles to deliver a smooth and visually refined experience while maintaining the flexibility of mpv’s configuration system. The application supports a wide range of media formats and includes features such as network streaming, external subtitles, and audio track management. It emphasizes usability improvements over traditional mpv-based players by simplifying navigation, file browsing, and playback controls. mpvEx also incorporates advanced playback options like picture-in-picture mode and background audio playback for multitasking. Its architecture allows deep customization through scripting and configuration, making it suitable for both casual users and advanced media enthusiasts. -
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InnerTune
A Material 3 YouTube Music client for Android
A Material 3 YouTube Music client for Android.
