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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Forever Free Full-Stack Observability | Grafana CloudBuilt on open standards like Prometheus and OpenTelemetry, Grafana Cloud includes Kubernetes Monitoring, Application Observability, Incident Response, plus the AI-powered Grafana Assistant. Get started with our generous free tier today.
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MongoDB Atlas runs apps anywhereMongoDB 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.
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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 But the v2ray core inside the aar is (probably) outdated.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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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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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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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. -
Gemini 3 and 200+ AI Models on One PlatformBuild generative AI apps with Vertex AI. Switch between models without switching platforms.
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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. -
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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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SimpMusic
A simple music app using YouTube Music for backend
A simple music app using YouTube Music for the backend. -
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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. -
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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. -
Custom VMs From 1 to 96 vCPUs With 99.95% UptimeLive migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
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CloudStream
Android app for streaming and downloading media
Android app for streaming and downloading media. -
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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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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. -
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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. -
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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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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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InnerTune
A Material 3 YouTube Music client for Android
A Material 3 YouTube Music client for Android. -
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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. -
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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. -
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Liquid Bounce
A free mixin-based injection hacked client for Minecraft
LiquidBounce is a free and open-source mixin-based injection hacked client using the Fabric API for Minecraft. LiquidBounce is a hacked client (also known as a cheat) for Minecraft and designed to give you a significant advantage over other players. Unlike many of its competitors, LiquidBounce is completely free, open source and compatible with Fabric. LiquidBounce's JavaScript API allows you to take care of that yourself. With just a few lines of code, you can develop your own modules and share them with the community. LiquidBounce allows you to customize the HUD according to your personal needs. So if you don't like the standard design, you can easily customize it to your exact needs. We believe quality does not have to be come with a price tag and therefore offer LiquidBounce for free. No hidden costs, no premium features. Just go ahead and download our client. -
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Rekado
Payload launcher and serial number checker for Nintendo Switch
Payload launcher is written in Kotlin for Nintendo Switch. The application doesn't require Root on your device. -
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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. -
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EtchDroid
An application to write OS images to USB drives, on Android
EtchDroid is an open-source application that writes disk images to USB drives. Use it to make a bootable operating system USB drive when your laptop is dead. -
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WhatsApp clone app
WhatsApp clone project demonstrates modern Android development
This is a WhatsApp clone app built with Stream Chat SDK for Compose to implement messaging systems and Stream Video SDK for Compose using Jetpack Compose. -
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Animity
Use the Android app to watch anime on your phone without ads
An Android app to watch anime on your phone without ads. Animity is an anime streaming app that provides high-quality streaming of your favorite anime shows. It's designed to be easy to use, so you can quickly find the anime you want to watch and start streaming. With Animity, you can also sync your account with Anilist, so you can keep track of your favorite shows and manage your anime watchlist. Whether you're a die-hard anime fan or a casual viewer, Animity has something for everyone. Animity parses website data and filter required info, thus It removes the ads for seamless experience. -
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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.
