Open source kotlin projects

Every project in the registry tagged kotlin, ranked by real GitHub adoption.

projects 37 combined stars ★ 109K refresh nightly
01 gradle ★ 19K

Adaptable, fast automation for all

last push16 hours ago languageGroovy licenseApache-2.0
02 ImageToolbox ★ 15K

🖼️ Image Toolbox is a powerful app for advanced image manipulation. It offers dozens of features, from basic tools like crop and draw to filters, OCR, and a wi

last push16 hours ago languageKotlin licenseApache-2.0
03 MaterialFiles ★ 9.4K

Material Design file manager for Android

last push19 days ago languageKotlin licenseGPL-3.0
04 Balloon ★ 4.0K

:balloon: Modernized and sophisticated tooltips, fully customizable with an arrow and animations for Compose and Kotlin Multiplatform.

last push6 days ago languageKotlin licenseApache-2.0
05 android ★ 4.0K

Home Assistant Companion for Android

last push19 hours ago languageKotlin licenseApache-2.0
06 chatgpt-android ★ 3.9K

📲 ChatGPT Android demonstrates a Chatbot application using OpenAI's chat API on Android with Stream Chat SDK for Compose.

last push10 months ago languageKotlin licenseApache-2.0
07 pants ★ 3.9K

The Pants Build System

last push20 hours ago languagePython licenseApache-2.0
08 dokka ★ 3.8K

API documentation engine for Kotlin

last push15 days ago languageKotlin licenseApache-2.0
09 springdoc-openapi ★ 3.7K

Library for OpenAPI 3 with spring-boot

last push10 days ago languageJava licenseApache-2.0
10 kotlin-logging ★ 3.1K

Lightweight Multiplatform logging framework for Kotlin. A convenient and performant logging facade.

last push20 hours ago languageKotlin licenseApache-2.0
11 apps-android-wikipedia ★ 3.1K

📱The official Wikipedia app for Android!

last push16 hours ago languageKotlin licenseApache-2.0
12 mytv-android ★ 3.0K

Material 3 Expressive 风格的Android/Android TV IPTV播放器,内建Media3,IJKplayer和 VLC。A Material 3 Expressive style Android/Android TV IPTV player with built-in Media3, I

last push31 hours ago language— licenseMIT
13 mill ★ 2.8K

A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools

last push18 hours ago languageScala licenseMIT
14 Lightning-Browser ★ 2.5K

A lightweight Android browser with modern navigation

last push23 hours ago languageKotlin licenseMPL-2.0
15 SeriesGuide ★ 2.2K

Track your TV shows and movies on Android

last push2 days ago languageKotlin license—
16 CatchUp ★ 2.1K

An app for catching up on things.

last push6 days ago languageKotlin licenseApache-2.0
17 FancyShowCaseView ★ 2.0K

An easy-to-use customisable show case view with circular reveal animation.

last push12 months ago languageKotlin licenseApache-2.0
18 Squircle-CE ★ 1.9K

👨‍💻 Squircle CE is a fast and free multi-language code editor for Android

last push21 days ago languageKotlin licenseApache-2.0
19 File-Manager ★ 1.8K

Easy app for managing your files without ads, respecting your privacy & security

last push23 hours ago languageKotlin licenseGPL-3.0
20 lets-plot ★ 1.8K

Multiplatform plotting library based on the Grammar of Graphics

last push4 months ago languageKotlin licenseMIT
21 gradle-maven-publish-plugin ★ 1.8K

A Gradle plugin that publishes your Android and Kotlin libraries, including sources and javadoc, to Maven Central or any other Nexus instance.

last push4 days ago languageKotlin licenseApache-2.0
22 amethyst ★ 1.6K

Nostr client for Android

last push17 hours ago languageKotlin licenseMIT
23 NOIR ★ 1.4K

手机隐私审计:用 adb 扫出 Android 应用的权限、上报端点与数据流向,并给出可回滚的处置。Desktop Android leak audit: permissions, endpoints, data flows, reversible fixes.

last push21 hours ago languageKotlin licenseMIT
24 Monica ★ 1.2K

Monica Pass,Password Management, 2FA Generator

last push35 hours ago languageKotlin licenseGPL-3.0
25 IdeaMemo ★ 1.2K

A Beautiful Memo App written with Jetpack Compose. 开源Android闪念笔记App。

last pushyesterday languageKotlin licenseGPL-3.0
26 skrape.it ★ 874

A Kotlin-based testing/scraping/parsing library providing the ability to analyze and extract data from HTML (server & client-side rendered). It places particula

last push14 days ago languageKotlin licenseMIT
27 PixImagePicker ★ 871

Pix is a Whatsapp image picker replica. with this, you can integrate an image picker just like WhatsApp.

last push7 months ago languageKotlin licenseApache-2.0
28 hammer-editor ★ 811

A simple tool for building stories.

last push18 hours ago languageKotlin licenseMIT
29 HTV ★ 811

A live media player app(电视直播软件)

last push4 days ago languageDart licenseApache-2.0
30 doodle ★ 802

A pure Kotlin UI framework for the Web and Desktop.

last push11 days ago languageKotlin licenseMIT
31 KeyPass ★ 787

KeyPass: Open Source Project & An Offline Password Manager. Store, manage, and take control securely.

last push2 days ago languageKotlin licenseMIT
32 CoolMallKotlin ★ 747

Full‑Featured Android Compose App Framework • Kotlin, MVVM, Navigation, Networking, Storage & Modular Architecture for Real‑World Projects

last push7 months ago languageKotlin licenseMIT
33 Visual-Code-Space ★ 692

A Modern Code Editor for Android

last push13 days ago languageKotlin licenseGPL-3.0
34 Pdf_Tools ★ 684

Privacy-first, offline PDF editor for Android. Merge, split, compress, convert and annotate PDFs — 100% on-device, no internet required.

last push3 days ago languageKotlin licenseApache-2.0
35 kuvasz ★ 669

Kuvasz (pronounce as [ˈkuvɒs]) is an open-source uptime and SSL monitoring service, with multiple notification channels, status pages, IAC support via YAML, Pro

last push18 hours ago languageKotlin licenseAGPL-3.0
36 Adb-Device-Manager-2 ★ 645

Dual-control Android management for Windows — ADB Mode (scrcpy GUI mirroring & control) and App Mode (calls, media, notifications, Audio Cast).

last push2 months ago languageHTML licenseApache-2.0
37 Orbital ★ 361

Connect APIs, databases, and streams without glue code

last push4 months ago languageTypeScript license—

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Frequently asked questions

How many open source kotlin projects are there?

This registry tracks 37 projects tagged kotlin, with 109,079 GitHub stars between them. The most-adopted is gradle at 18,913 stars.

Are these kotlin projects free to use?

Yes — 35 of the 37 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.

Which kotlin project should I choose?

The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.

Are these kotlin projects still maintained?

31 of the 37 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.