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.

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

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    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

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  • 1
    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: 111 This Week
    Last Update:
    See Project
  • 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: 56 This Week
    Last Update:
    See Project
  • 3
    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: 29 This Week
    Last Update:
    See Project
  • 4
    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:
    See Project
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
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  • 5
    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: 9 This Week
    Last Update:
    See Project
  • 6
    Gitnuro

    Gitnuro

    A FOSS Git multiplatform client for newbies and pros

    A FOSS Git client based on (Jetbrains) Compose and JGit. The main goal of Gitnuro is to provide a multiplatform open-source Git client without any kind of constraint to how you can use it or rely on web technologies.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 7
    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: 7 This Week
    Last Update:
    See Project
  • 8
    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: 6 This Week
    Last Update:
    See Project
  • 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: 6 This Week
    Last Update:
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  • Rent Manager Software Icon
    Rent Manager Software

    Landlords, multi-family homes, manufactured home communities, single family homes, associations, commercial properties and mixed portfolios.

    Rent Manager is award-winning property management software built for residential, commercial, and short-term-stay portfolios of any size. The program’s fully customizable features include a double-entry accounting system, maintenance management/scheduling, marketing integration, mobile applications, more than 450 insightful reports, and an API that integrates with the best PropTech providers on the market.
    Learn More
  • 10
    VValidator

    VValidator

    An easy to use form validator for Kotlin & Android

    View Validator, an easy-to-use form validation library for Kotlin & Android.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 11
    kotlin-csv

    kotlin-csv

    Pure Kotlin CSV Reader/Writerx

    Pure Kotlin CSV Reader/Writer.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 12
    Binary compatibility validator

    Binary compatibility validator

    Public API management tool

    The tool allows dumping of binary API of a JVM part of a Kotlin library that is public in the sense of Kotlin visibilities and ensures that the public binary API wasn't changed in a way that makes this change binary incompatible.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 13
    Compose Navigation Reimagined

    Compose Navigation Reimagined

    Type-safe navigation library for Jetpack Compose

    A small and simple, yet fully fledged and customizable navigation library for Jetpack Compose.
    Downloads: 5 This Week
    Last Update:
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  • 14
    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: 5 This Week
    Last Update:
    See Project
  • 15
    Kotshi

    Kotshi

    An annotation processor that generates Moshi adapters

    An annotation processor that generates Moshi adapters from Kotlin classes. There is a reflective adapter for Kotlin but that requires the Kotlin reflection library which adds a lot of methods and increases the binary size which in a constrained environment such as Android is something is not preferable. This is where Kotshi comes in, it generates fast and optimized adapters for your Kotlin data classes, just as if you'd written them by hand yourself. It will automatically regenerate the adapters when you modify your class. It's made to work with minimal setup, through there are limitations. Most of the limitations will be addressed as the support for Kotlin annotation processors improves.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 16
    Material Contextual Action Bar

    Material Contextual Action Bar

    Android & Kotlin library for placing Contextual Action Bars

    Material CAB allows you to implement a customizable and flexible contextual action bar in your app. The traditional stock CAB on Android is limited to being placed at the top of your Activity, and the navigation drawer cannot go over it. This library lets you choose its exact location, and a toolbar is used, allowing views to be be placed over and under it.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 17
    Beagle

    Beagle

    Customizable debug menu library for Android apps

    A smart, reliable, and highly customizable debug menu library for Android apps that supports screen recording, network activity logging, and many other useful features.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 18
    Einsen

    Einsen

    Einsen is a prioritization app that uses Eisenhower matrix technique

    Einsen is a prioritization app that uses Eisenhower matrix technique as a workflow to prioritize a list of tasks & built to Demonstrate the use of Jetpack Compose with Modern Android Architecture Components & MVVM Architecture.
    Downloads: 4 This Week
    Last Update:
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  • 19
    GraphQL Kotlin

    GraphQL Kotlin

    Libraries for running GraphQL in Kotlin

    graphql-java is one of the most popular JVM-based GraphQL implementations. GraphQL Kotlin is built on top of grahpql-java as it can be easily extended with additional functionality and this implementation has been used and tested by many users. The most common way to create the schema in graphql-java is to first manually write the SDL file. Then write the runtime code that matches this schema to build the GraphQLSchema object. This means that there are two sources of truth for your schema and changes in either have to be reflected in both locations. As your schema scales to hundreds of types and many different resolvers, it can get more difficult to track what code needs to be changed if you want to add a new field, deprecate or delete an existing one, or fix a bug in the resolver code. graphql-kotlin-schema-generator aims to simplify this process by using Kotlin reflection to generate the schema for you. All you need to do is write your schema code in a Kotlin class.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 20
    Jetpack Compose Playground

    Jetpack Compose Playground

    Community-driven collection of Jetpack Compose example code

    This is a community-driven collection of Jetpack Compose documentation/examples/tutorials and demos. Jetpack Compose is a modern toolkit for building native Android UI. Jetpack Compose simplifies and accelerates UI development on Android with less code, powerful tools, and intuitive Kotlin APIs.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 21
    KMP NativeCoroutines

    KMP NativeCoroutines

    Library to use Kotlin Coroutines from Swift code in KMP apps

    A library to use Kotlin Coroutines from Swift code in KMP apps. Both KMP and Kotlin Coroutines are amazing, but together they have some limitations. The most important limitation is cancellation support. Kotlin suspend functions are exposed to Swift as functions with a completion handler. This allows you to easily use them from your Swift code, but it doesn't support cancellation. Besides cancellation support, ObjC doesn't support generics on protocols. The library consists of a Kotlin and Swift part which you'll need to add to your project.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 22
    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: 4 This Week
    Last Update:
    See Project
  • 23
    Lets-Plot

    Lets-Plot

    Multiplatform plotting library based on Grammar of Graphics

    Lets-Plot is a multiplatform plotting library based on the Grammar of Graphics. The library' design is heavily influenced by Leland Wilkinson work The Grammar of Graphics describing the deep features that underlie all statistical graphics.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 24
    MaterialDrawer

    MaterialDrawer

    Drawer library for your Android project

    The flexible, easy to use, all in one drawer library for your Android project. Does your application contain a Drawer? Do you want to have it up and running in less than 5 minutes? Do you want your drawer to follow the Android Design Guidelines? Do you have profiles? Do you need flexibility? Is Google’s navigation Drawer of the design support not enough for you? Do you want a simple and easy to understand api? Never waste your time again. It provides you with the easiest possible implementation of a navigation drawer for your application. There is a Header with profiles (AccountHeader), a MiniDrawer for Tablets (like Gmail), provide custom DrawerItems, custom colors, custom themes. No limits for customizations. Comes with various themes which help to get your own themes clean. Comes with multiple default drawer items.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 25
    Mordant

    Mordant

    Multiplatform text styling for Kotlin command-line applications

    Mordant is a multiplatform library for rendering styled text in the terminal. You can use it to add color and style to text, create tables, draw animations, and more.
    Downloads: 4 This Week
    Last Update:
    See Project
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