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Kotlin repos to contribute to

OpenSrc lists 27 Kotlin repositories with open issues for new contributors, and 10 of them are first-PR friendly. Between them they have 454 open good first issues and 317 help-wanted issues. The median welcome score is 74/100, and the best-scored right now are home-assistant/android, nextcloud/android and wordpress-mobile/WordPress-Android. Most are about Mobile, Web Frontend and Backend & APIs.

27 repos by best score

Filter these in the directory

  • home-assistant/android

    Home Assistant Companion for Android

    24good first issues
    • Kotlin
    • Field: Mobile
    • Stars:3.9K
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~13h
    Score93 out of 100 contributor score, very welcomingFirst-PR friendly

  • nextcloud/android

    📱 Nextcloud Android app

    13good first issues+9 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:5.6K
    • GPL-2.0
    • CONTRIBUTING
    • replies in ~23h
    Score92 out of 100 contributor score, very welcomingFirst-PR friendly

  • wordpress-mobile/WordPress-Android

    WordPress for Android

    23good first issues
    • Kotlin
    • Field: Mobile
    • Stars:3.2K
    • GPL-2.0
    • CONTRIBUTING
    • replies in ~1m
    Score92 out of 100 contributor score, very welcomingFirst-PR friendly

  • thunderbird/thunderbird-android

    Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

    17good first issues+30 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:14K
    • Apache-2.0
    • CONTRIBUTING
    Score85 out of 100 contributor score, very welcomingFirst-PR friendly

  • mobile-dev-inc/Maestro

    Painless E2E Automation for Mobile and Web

    10good first issues
    • Kotlin
    • Field: Mobile
    • Field: Web Frontend
    • Stars:15.8K
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~30m
    Score83 out of 100 contributor score, very welcomingFirst-PR friendly

  • facebook/fresco

    An Android library for managing images and the memory they use.

    29good first issues+39 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:17.2K
    • MIT
    • CONTRIBUTING
    • replies in ~30d
    Score82 out of 100 contributor score, very welcoming

  • oppia/oppia-android

    A free online & offline learning platform to make quality education accessible for all.

    36good first issues
    • Kotlin
    • Field: Mobile
    • Field: Accessibility
    • Stars:415
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~4d
    Score80 out of 100 contributor score, very welcoming

  • intellij-powershell/intellij-powershell

    Adds PowerShell language support to IntelliJ-based IDEs.

    22good first issues+55 help wanted
    • Kotlin
    • Field: Editors
    • Stars:96
    • Apache-2.0
    • CONTRIBUTING
    Score78 out of 100 contributor score, very welcomingFirst-PR friendly

  • getsentry/sentry-java

    A Sentry SDK for Java, Android and other JVM languages.

    13good first issues+1 help wanted
    • Kotlin
    • Field: Mobile
    • Field: Web Frontend
    • Stars:1.4K
    • MIT
    • CONTRIBUTING
    • replies in ~17d
    Score77 out of 100 contributor score, very welcoming

  • ankidroid/Anki-Android

    AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.

    17good first issues+23 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:11.9K
    • GPL-3.0
    • CONTRIBUTING
    Score76 out of 100 contributor score, very welcomingFirst-PR friendly

  • Automattic/pocket-casts-android

    Pocket Casts Android 🎧

    15good first issues
    • Kotlin
    • Field: Mobile
    • Stars:2.8K
    • MPL-2.0
    • CONTRIBUTING
    • replies in ~30d
    Score76 out of 100 contributor score, very welcoming

  • commons-app/apps-android-commons

    The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to…

    53good first issues+7 help wanted
    • Kotlin
    • Field: Mobile
    • Field: Backend
    • Stars:1.2K
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~2d
    Score75 out of 100 contributor score, very welcomingFirst-PR friendly

  • cryptomator/android

    Cryptomator for Android

    14good first issues
    • Kotlin
    • Field: Mobile
    • Stars:1.2K
    • GPL-3.0
    • CONTRIBUTING
    • replies in ~30d
    Score74 out of 100 contributor score, welcoming

  • openfoodfacts/openfoodfacts-androidapp

    (Legacy) Native version of Open Food Facts on Android - Coders & Decoders welcome 🤳🥫

    9good first issues+30 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:805
    • Apache-2.0
    • CONTRIBUTING
    Score74 out of 100 contributor score, welcomingFirst-PR friendly

  • pachli/pachli-android

    The Pachli Android app

    20good first issues
    • Kotlin
    • Field: Mobile
    • Field: Networking
    • Stars:254
    • GPL-3.0
    • CONTRIBUTING
    • replies in ~30d
    Score73 out of 100 contributor score, welcoming

  • RetroMusicPlayer/RetroMusicPlayer

    Best Material You Design music player for Android

    6good first issues+2 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:5.3K
    • GPL-3.0
    • CONTRIBUTING
    • replies in ~30d
    Score71 out of 100 contributor score, welcoming

  • open-telemetry/opentelemetry-kotlin

    An implementation of the OpenTelemetry specification as a Kotlin Multiplatform Library

    17good first issues+33 help wanted
    • Kotlin
    • Field: Mobile
    • Field: Observability
    • Stars:146
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~20d
    Score70 out of 100 contributor score, welcoming

  • SKaiNET-developers/SKaiNET

    SKaiNET makes local AI practical for developers: simple to build with, multiplatform by design, and optimized…

    14good first issues+2 help wanted
    • Kotlin
    • Field: Machine Learning
    • Stars:52
    • MIT
    • CONTRIBUTING
    • replies in ~30d
    Score70 out of 100 contributor score, welcoming

  • square/workflow-kotlin

    A Swift and Kotlin library for making composable state machines, and UIs driven by those state machines.

    9good first issues+3 help wanted
    • Kotlin
    • Field: Web Frontend
    • Field: Mobile
    • Stars:1.1K
    • Apache-2.0
    • CONTRIBUTING
    Score69 out of 100 contributor score, welcomingFirst-PR friendly

  • K1rakishou/Kuroba-Experimental

    Free and open source image board browser

    15good first issues+51 help wanted
    • Kotlin
    • Stars:798
    • GPL-3.0
    Score69 out of 100 contributor score, welcoming

  • stadiamaps/ferrostar

    A FOSS navigation SDK built from the ground up for the future

    19good first issues+4 help wanted
    • Kotlin
    • Stars:430
    • CONTRIBUTING
    • replies in ~30d
    Score67 out of 100 contributor score, welcoming

  • opensearch-project/index-management

    🗃 Automate periodic data operations, such as deleting indices at a certain age or performing a rollover at a…

    16good first issues
    • Kotlin
    • Stars:76
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~30d
    Score65 out of 100 contributor score, welcoming

  • kiwix/kiwix-android

    Kiwix for Android

    7good first issues
    • Kotlin
    • Field: Mobile
    • Stars:1.5K
    • GPL-3.0
    • CONTRIBUTING
    • replies in ~30d
    Score64 out of 100 contributor score, welcoming

  • partiql/partiql-lang-kotlin

    PartiQL libraries and tools in Kotlin.

    12good first issues+1 help wanted
    • Kotlin
    • Field: Databases
    • Stars:546
    • Apache-2.0
    • CONTRIBUTING
    • replies in ~30d
    Score64 out of 100 contributor score, welcoming

  • fcitx5-android/fcitx5-android

    Fcitx5 input method framework and engines ported to Android

    5good first issues+11 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:5.7K
    • LGPL-2.1
    • replies in ~30d
    Score57 out of 100 contributor score, welcoming

  • msbelaid/PlugBrain

    A focus app that unlocks distracting apps only after solving adaptive math challenges.

    11good first issues+10 help wanted
    • Kotlin
    • Field: Mobile
    • Stars:93
    • GPL-3.0
    • CONTRIBUTING
    Score50 out of 100 contributor score, some assembly required

  • orchestr7/ktoml

    Kotlin Multiplatform parser and compile-time serializer/deserializer for TOML format (Fully Native, JS, JVM)…

    8good first issues+6 help wanted
    • Kotlin
    • Field: Compilers
    • Stars:574
    • MIT
    Score47 out of 100 contributor score, some assembly required