Browse free open source Kotlin Libraries and projects below. Use the toggles on the left to filter open source Kotlin Libraries 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: 149 This Week
    Last Update:
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  • 2
    Mtk Easy Su

    Mtk Easy Su

    Get bootless root access with few clicks.

    This app set up bootless super user access, with Magisk and Mtk-su, on MediaTek Android devices. To facilitate those wishing to use the security breach Mtk-su by Diplomatic. If you are a more advanced user. I recommend using the mtk-su tool from the terminal, you will have more possibilities and control over the process.
    Downloads: 93 This Week
    Last Update:
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  • 3
    Rekado

    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.
    Downloads: 89 This Week
    Last Update:
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  • 4
    MRepo

    MRepo

    A Modules Manager for Magisk & KernelSU

    MRepo (short for My Repository or Modules Repository) is an Android app that helps manage your own modules repository.
    Downloads: 10 This Week
    Last Update:
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    LibChecker

    LibChecker

    An app to view libraries used in apps in your device

    This app is used to view the third-party libraries used by applications in your device. It can view the ABI architecture of the application's native library (in general, whether the application is 64-bit or 32-bit). It can also view well-known libraries marked by The Rule Repository, and can even sort and view them according to the number of libraries references.
    Downloads: 9 This Week
    Last Update:
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  • 6
    Kord

    Kord

    Idiomatic Kotlin Wrapper for The Discord API

    Kord is still in an experimental stage, as such we can't guarantee API stability between releases. While we'd love for you to try out our library, we don't recommend you use this in production just yet. Kord was created as an answer to the frustrations of writing Discord bots with other JVM libraries, which either use thread-blocking code or verbose and scope-restrictive reactive systems. We believe an API written from the ground up in Kotlin with coroutines can give you the best of both worlds: The conciseness of imperative code with the concurrency of reactive code. Aside from coroutines, we also wanted to give the user full access to lower-level APIs. Sometimes you have to do some unconventional things, and we want to allow you to do those in a safe and supported way.
    Downloads: 8 This Week
    Last Update:
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  • 7
    kotlinx.coroutines

    kotlinx.coroutines

    Library support for Kotlin coroutines

    Library support for Kotlin coroutines with multiplatform support. Kotlin, as a language, provides only minimal low-level APIs in its standard library to enable various other libraries to utilize coroutines. Unlike many other languages with similar capabilities, async and await are not keywords in Kotlin and are not even part of its standard library. Moreover, Kotlin's concept of suspending function provides a safer and less error-prone abstraction for asynchronous operations than futures and promises. kotlinx.coroutines is a rich library for coroutines developed by JetBrains. It contains a number of high-level coroutine-enabled primitives that this guide covers, including launch, async and others. Coroutines can be thought of as light-weight threads, but there is a number of important differences that make their real-life usage very different from threads.
    Downloads: 8 This Week
    Last Update:
    See Project
  • 8
    CPU Info

    CPU Info

    CPU Info provides information about device hardware and software

    CPU Info provides the main information about the hardware and software of your device.
    Downloads: 7 This Week
    Last Update:
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  • 9
    Hoplite

    Hoplite

    Boilerplate-free Kotlin config library for loading configuration files

    Hoplite is a Kotlin library for loading configuration files into typesafe classes in a boilerplate-free way. Define your config using Kotlin data classes, and at startup Hoplite will read from one or more config files, mapping the values in those files into your config classes. Any missing values, or values that cannot be converted into the required type will cause the config to fail with detailed error messages.
    Downloads: 7 This Week
    Last Update:
    See Project
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  • 10
    Linux Command Library (Mobile+CLI+Web)

    Linux Command Library (Mobile+CLI+Web)

    1M downloads Linux reference app with basics, tips and formatted pages

    The app currently has 5547 manual pages, 22+ basic categories and a bunch of general terminal tips. It works 100% offline, doesn't need an internet connection and has no tracking software.
    Downloads: 6 This Week
    Last Update:
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  • 11
    Kotlin JDSL

    Kotlin JDSL

    Kotlin library that makes it easy to build and execute queries

    Kotlin JDSL is a Kotlin library that makes it easy to build a query without a generated metamodel. There are many libraries that use an annotation processing tool (APT) to do the job. However, with the APT, you have to recompile whenever the name or type of field in an entity or a table class is changed. Kotlin JDSL provides a domain-specific language (DSL) based on KClass and KProperty to help you easily build queries without such inconveniences from the APT. Kotlin JDSL does not provide an executor or a wrapper class as it is designed to help you build and execute queries with the library you are using.
    Downloads: 5 This Week
    Last Update:
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  • 12
    PhotoEditor

    PhotoEditor

    A Photo Editor library with simple, easy support for image editing

    A Photo Editor library with simple, easy support for image editing using Paints, Text, Filters, Emoji and Sticker like stories. Drawing on the image with the option to change its Brush's Color, Size, Opacity, Erasing and basic shapes. Apply Filter Effect on the image using MediaEffect. Adding/Editing Text with the option to change its Color with Custom Fonts. Adding Emoji with Custom Emoji Fonts. Adding Images/Stickers. Pinch to Scale and Rotate views. Undo and Redo for Brush and Views. Deleting Views. Saving Photo after editing. More FAQ. PhotoEditor v.1.0.0 is a migration to androidX and dropping the support of the older support library. There are no API changes. If you find any issues migrating to v.1.0.0, please follow this Guide. If you still facing the issue then you can always rollback to v.0.4.0.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 13
    Gramophone

    Gramophone

    A sane music player built with media3 and material design library

    A sane media3-based Material3 music player that follows Android standards. Gramophone is a sane music player built with media3 and a material design library that follows android's standards strictly.
    Downloads: 4 This Week
    Last Update:
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  • 14
    Kotlin Language Server

    Kotlin Language Server

    Kotlin code completion, diagnostics and more for any editor/IDE

    A language server that provides smart code completion, diagnostics, hover, document symbols, definition lookup, method signature help and more for Kotlin.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 15
    LeakCanary

    LeakCanary

    A memory leak detection library for Android

    LeakCanary is a reliable memory leak detection library for Android. It effectively detects leaks and narrows down the cause of each leak through its in-depth knowledge of the internals of the Android Framework. This helps developers avoid and dramatically reduce OutOfMemoryError (OOM) crashes. A memory leak is a programming error that can cause an OutOfMemoryError crash. It’s often caused by bugs related to the lifecycle of objects, and can occur fairly often in Android applications. LeakCanary helps to find and fix those leaks during development so you never have to experience another OOM crash.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 16
    Myne

    Myne

    An android app to download ebooks from Project Gutenberg

    Myne is a FOSS Android application to download ebooks from Project Gutenberg, it uses GutenDex API to fetch metadata of ebooks in the backend.
    Downloads: 4 This Week
    Last Update:
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  • 17
    Android Contacts, Reborn

    Android Contacts, Reborn

    Android Contacts API Library written in Kotlin

    This library provides a complete set of APIs to do everything you need with Contacts in Android. You no longer have to deal with the Contacts Provider, database operations, and cursors. Whether you just need to get all or some Contacts for a small part of your app (written in Kotlin or Java), or you are looking to create your own full-fledged Contacts app with the same capabilities as the AOSP Android Contacts app and Google Contacts app, this library is for you.
    Downloads: 3 This Week
    Last Update:
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  • 18
    Anko

    Anko

    An Android application development library

    Anko is a Kotlin library which makes Android application development faster and easier. It makes your code clean and easy to read, and lets you forget about rough edges of the Android SDK for Java. Anko was born as a type-safe DSL for building Android layouts. It not only allowed creating layouts in a type-safe way, but it made the layouts more adaptable, dynamic, reusable, and also performant, as there was no need for expensive layout inflation. Anko consists of several parts that make up the complete framework, which are: Anko Commons: a lightweight library full of helpers for intents, dialogs, logging and so on. Anko Layouts: a fast and type-safe way to write dynamic Android layouts. Anko SQLite: a query DSL and parser collection for Android SQLite. Anko Coroutines: utilities based on the kotlinx.coroutines library.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 19
    Compose Rich Editor

    Compose Rich Editor

    A Rich text editor library for both Jetpack Compose

    A rich text editor library for both Jetpack Compose and Compose Multiplatform, fully customizable and supports the common rich text editor features.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 20
    Decompose

    Decompose

    Kotlin Multiplatform lifecycle-aware business logic components

    Decompose is a Kotlin Multiplatform library for breaking down your code into tree-structured lifecycle-aware business logic components (aka BLoC), with routing functionality and pluggable UI (Jetpack/Multiplatform Compose, Android Views, SwiftUI, Kotlin/React, etc.).
    Downloads: 3 This Week
    Last Update:
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  • 21
    Fakeit

    Fakeit

    The Kotlin fake data generator library!

    This library is a port of the Ruby Gem Faker. It generates realistic fake data — like names, emails, dates, and countries, for a variety of scenarios, including automated testing and database population. The library was originally created for Android projects, but it can be used in any Java or Kotlin project.
    Downloads: 3 This Week
    Last Update:
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  • 22
    Kotlin Wrappers

    Kotlin Wrappers

    Kotlin wrappers for popular JavaScript libraries

    This repository hosts a number of Kotlin wrappers for popular JavaScript libraries. To learn more please refer to the READMEs of individual modules. Artifacts are published to Maven Central, see the corresponding README files for package coordinates. All packages require JDK 8 to be installed.
    Downloads: 3 This Week
    Last Update:
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  • 23
    Kotter

    Kotter

    A declarative, Kotlin-idiomatic API for writing dynamic console app

    Kotter (a KOTlin TERminal library) aims to be a relatively thin, declarative, Kotlin-idiomatic API that provides useful functionality for writing delightful console applications. It strives to keep things simple, providing a solution a bit more opinionated than making raw println calls but way less featured than something like Java Curses.
    Downloads: 3 This Week
    Last Update:
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  • 24
    PartiQL Lang Kotlin

    PartiQL Lang Kotlin

    PartiQL libraries and tools in Kotlin.

    This is a Kotlin implementation of the PartiQL specification. PartiQL is based on SQL-92 and has added support for working with schemaless hierarchical data. PartiQL’s extensions to SQL are easy to understand, treat nested data as first-class citizens, and compose seamlessly with each other and SQL. This repository contains an embeddable reference interpreter, test framework, and tests for PartiQL in Kotlin.
    Downloads: 3 This Week
    Last Update:
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  • 25
    AAA

    AAA

    Curated list of the best FOSS Android apps to maximize your freedom

    This is a list of the best FOSS apps according to us. You can prove us wrong on the contributing page.
    Downloads: 2 This Week
    Last Update:
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