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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
    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: 16 This Week
    Last Update:
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  • 2
    Next Player

    Next Player

    An Android native video player

    Next Player is an Android native video player written in Kotlin. It provides a simple and easy-to-use interface for users to play videos on their Android devices.
    Downloads: 16 This Week
    Last Update:
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  • 3
    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: 16 This Week
    Last Update:
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  • 4
    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: 15 This Week
    Last Update:
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    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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  • 5
    KeyMapper

    KeyMapper

    An Android app that change what the buttons do on your devices

    Key Mapper is a free and open source Android app that can remap your buttons and fingerprint reader gestures. The aim of this project is to allow anyone to map their buttons in any combination to anything. You can combine multiple keys from a specific device or from any device to form an "activator". Each activator can have multiple actions. The keys can be configured to be pressed at the same time or one after another in a sequence. Keys can be reassigned when pressed briefly, pressed long, or pressed twice. A key map can have a set of "restrictions" so that it only takes effect in certain situations.
    Downloads: 15 This Week
    Last Update:
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  • 6
    Intellij rainbow brackets

    Intellij rainbow brackets

    Rainbow Brackets for IntelliJ based IDEs/Android Studio/HUAWEI DevEco

    Compatible with IntelliJ IDEA, PhpStorm, WebStorm, PyCharm, RubyMine, AppCode, CLion, Gogland, DataGrip, Rider, MPS, Android Studio, HUAWEI DevEco Studio, DataSpell, Code With Me. Supports Java, Scala, Clojure, Kotlin, Python, Haskell, Agda, Rust, JavaScript, TypeScript, Erlang, Go, Groovy, Ruby, Elixir, ObjectiveC, PHP, HTML, XML, SQL, Apex language, C#, Dart, Pug/Jade, Bash, Vue.js, C# Razor Pages, GLSL(the OpenGL Shading Language), Go Template, C++, C, etc. Eliminate context switching and costly distractions. Create and merge PRs and perform code reviews from inside your IDE while using jump-to-definition, your keybindings, and other IDE favorites. If you didn't like the built-in colors, or want some new color but don't want to try out and pick colors. Please use color generator. And you can use the color generator and config your number of colors at the same time.
    Downloads: 14 This Week
    Last Update:
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  • 7
    LibreTube

    LibreTube

    An alternative frontend for YouTube, for Android

    YouTube has an extremely invasive privacy policy that relies on using user data in unethical ways. They store a lot of your personal data - ranging from ideas, music taste, content, political opinions, and much more than you think. This project is aimed at improving the users' privacy by being independent from Google and bypassing their data collection. Therefore, the app is using the Piped API, which uses proxies to circumvent Google's data collection and includes some other additional features.
    Downloads: 14 This Week
    Last Update:
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  • 8
    AVNC

    AVNC

    VNC Client for Android

    Fast & Secure VNC client for Android. AVNC is an open source VNC client for Android. It allows you to remotely control any device running a VNC server.
    Downloads: 13 This Week
    Last Update:
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  • 9
    AnkiDroid

    AnkiDroid

    Anki flashcards on Android

    Anki flashcards on Android. Your secret trick to achieve superhuman information retention. A semi-official port of the open source Anki spaced repetition flashcard system to Android. Memorize anything with AnkiDroid.
    Downloads: 13 This Week
    Last Update:
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  • 10
    Image Picker Library for Android

    Image Picker Library for Android

    Image Picker for Android, Pick an image from Gallery

    Easy to use and configurable library to Pick an image from the Gallery or Capture an image using a Camera. It also allows to Crop and Compress the Image based on Aspect Ratio, Resolution, and Image Size. Almost 90% of the apps that I have developed have an Image upload feature. Along with the image selection, Sometimes I needed a crop feature for my profile image for that I've used uCrop. Most of the time I need to compress the image as the image captured from the camera is more than 5-10 MBs and sometimes we have a requirement to upload images with specific resolution/size, in that case, image compression is the way to go option. To simplify the image pick/capture option I have created the ImagePicker library. I hope it will be useful to all.
    Downloads: 13 This Week
    Last Update:
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  • 11
    Breezy Weather

    Breezy Weather

    A Material Design Weather Application

    Breezy Weather is a privacy-focused, open-source Android weather app with a clean and modern interface. It aggregates weather data from various providers while respecting user privacy, offering features like current conditions, forecasts, and weather widgets. The app is designed to be lightweight, customizable, and completely ad-free.
    Downloads: 12 This Week
    Last Update:
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  • 12
    ChatGPT Android

    ChatGPT Android

    ChatGPT Android demonstrates OpenAI's ChatGPT on Android

    ChatGPT Android demonstrates OpenAI's ChatGPT on Android with Stream Chat SDK for Compose.
    Downloads: 12 This Week
    Last Update:
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  • 13
    Chucker

    Chucker

    An HTTP inspector for Android & OkHTTP (like Charles but on device)

    Chucker simplifies the inspection of HTTP(S) requests/responses fired by your Android App. Chucker works as an OkHttp Interceptor persisting all those events inside your application, and providing a UI for inspecting and sharing their content. Apps using Chucker will display a notification showing a summary of ongoing HTTP activity. Tapping on the notification launches the full Chucker UI. Apps can optionally suppress the notification, and launch the Chucker UI directly from within their own interface.
    Downloads: 12 This Week
    Last Update:
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  • 14
    Facebook SDK for Android

    Facebook SDK for Android

    Used to integrate Android apps with Facebook Platform

    This open-source library allows you to integrate Facebook into your Android app. Integrate your Android app with Facebook to build engaging social apps by using the Facebook SDK for Android. To learn more about using Facebook development tools. The current version of the Facebook SDK for Android is version 11.2.0 and requires the Android API 15. Code and samples for the Facebook SDK for Android are available on GitHub. A secure and convenient way for people to log into your app or website by using their Facebook credentials. Enable people to post to Facebook from your app. People can share, send a message, and share to stories. Understand people's actions in your app and measure the effectiveness of your Mobile App Ads. Get data in and out of Facebook's social graph, query data, post stories, upload photos and perform other tasks.
    Downloads: 12 This Week
    Last Update:
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  • 15
    Kitsunebi

    Kitsunebi

    A fully-featured V2Ray client for Android

    A fully-featured V2Ray client for Android. The Core used by Kitsunebi extends the function of v2ray-core, and adds a strategy of selecting the fastest node according to the node delay value. You can add a node group on the graphical interface to enable it. If you use custom configuration, there are several configuration items, except for tolerance. The delay test is not ICMP Ping or TCP Ping, the method used is roughly the same as that used by the latency strategy in load balancing, actually sends a proxy request to outbound, and records the time it takes to return non-null data. The delay test is also equivalent to the availability or connectivity test. As long as the delay can be measured, it means that the node is available. If it cannot be measured or times out, the availability is unknown.
    Downloads: 12 This Week
    Last Update:
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  • 16
    Komga

    Komga

    Media server for comics/mangas/BDs/magazines/eBooks with API and OPDS

    A media server for your comics, mangas, BDs, magazines, and eBooks. Organize your CBZ, CBR, PDF, and EPUB files in different libraries, collections, or reading lists. Use the integrated Webreader, the Tachiyomi extension, any OPDS reader, or other integrations.
    Downloads: 12 This Week
    Last Update:
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  • 17
    Audio Share

    Audio Share

    Audio Share can share Windows/Linux computer's audio to Android phone

    Audio Share can share Windows/Linux computer's audio to Android phone over network, so your phone becomes the speaker of computer. (You needn't buy a new speaker😄.) https://github.com/mkckr0/audio-share
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    Downloads: 306 This Week
    Last Update:
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  • 18
    Jellyfin Android

    Jellyfin Android

    Android Client for Jellyfin

    Jellyfin Mobile is an Android app that connects to Jellyfin instances and integrates with the official web client. We welcome all contributions and pull requests! If you have a larger feature in mind please open an issue so we can discuss the implementation before you start. Even though the client is only a web wrapper there are still lots of improvements and bug fixes that can be accomplished with Android and Kotlin knowledge.
    Downloads: 11 This Week
    Last Update:
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  • 19
    Kiwix Android

    Kiwix Android

    Kiwix for Android

    Kiwix is an offline reader for Web content. One of its main purposes is to make Wikipedia available offline. This is done by reading the content of a file in the ZIM format, a highly compressed open format with additional metadata.
    Downloads: 11 This Week
    Last Update:
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  • 20
    Klick'r

    Klick'r

    An open-source auto clicker on images for Android

    Klick'r is an open-source Android application designed to automate repetitive tasks effortlessly. Formerly known as Smart AutoClicker, Klick'r offers unique image detection capabilities alongside traditional auto-clicking functionalities, providing a versatile solution for all your automation needs. Whether you’re a gamer automating in-game actions, a tester simulating user interactions, or anyone performing repetitive clicking tasks, Klick'r offers both image detection for sophisticated automation and a Regular Mode for straightforward auto-clicking.
    Downloads: 11 This Week
    Last Update:
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  • 21
    ReVanced Patcher

    ReVanced Patcher

    ReVanced Patcher used to patch Android applications

    Customize your mobile experience through ReVanced by applying patches to your applications. ReVanced was born out of Vanced's discontinuation and it is our goal to continue the legacy of what Vanced left behind. Thanks to ReVanced Patcher, it's possible to create long-lasting patches for nearly any Android app. ReVanced's patching system is designed to allow patches to work on new versions of the apps automatically with bare minimum maintenance.
    Downloads: 11 This Week
    Last Update:
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  • 22
    Quarkdown

    Quarkdown

    Markdown with superpowers, from ideas to papers, and presentations

    Quarkdown is a lightweight Markdown processor and static site generator written in Java. It converts Markdown files into styled HTML pages with customizable themes, supporting blog creation and simple documentation websites. Quarkdown emphasizes simplicity and speed, providing an out-of-the-box experience for minimal personal sites.
    Downloads: 10 This Week
    Last Update:
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  • 23
    SagerNet

    SagerNet

    The universal proxy toolchain for Android

    The universal proxy toolchain for Android, written in Kotlin. To use hysteria plugin with version smaller than 1.2.1, the highest compatible version of SagerNet is 0.8.1-rc02. The new protocol is designed to improve UDP performance and provide full replay protection. Using an MTU larger than the upstream interface will only improve speed in some scenarios and may result in UDP packet loss. According to the gfw.report et al's research, when connecting to the impacted VPSs, GFW is likely to block binary protocols unless it is an HTTP, TLS, or SSH connection, or the first 6 bytes of data sent from client to server can be interpreted as printable characters. This suggests in addition to TLS encryption, HTTP Header, this kind of censorship can also be temporarily evaded by only sending printable characters in the first 6 bytes of data.
    Downloads: 10 This Week
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  • 24
    Simple Gallery

    Simple Gallery

    A premium app for managing and editing your photos, videos

    Simple Gallery brings you all the photo viewing and editing features you have been missing on your Android in one stylish easy-to-use app. Browse, manage, crop and edit photos or videos faster than ever, recover accidentally deleted files or create hidden galleries for your most precious images and videos. And with advanced file support and full customization, finally, your gallery works just the way you want. Turn photo editing into child's play with Simple Gallery's improved file organizer and photo album. Intuitive gestures make it super easy to edit your images on the fly. Crop, flip, rotate and resize pictures or apply stylish filters to make them pop in an instant. Simple Gallery supports a huge variety of different file types including JPEG, PNG, MP4, MKV, RAW, SVG, GIF, Panoramic photos, videos and many more, so you enjoy full flexibility in your choice of format.
    Downloads: 10 This Week
    Last Update:
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  • 25
    Inure App Manager

    Inure App Manager

    An elegant and beautiful premium Android app manager

    An elegant and beautiful premium Android app manager for both rooted and non-rooted devices with a built-in terminal, analytics panel and an independent custom theme engine, developed with purely custom APIs created for this app.
    Downloads: 9 This Week
    Last Update:
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