Best Open Source kotlin Libraries
A curated list of the most popular GitHub repositories tagged with kotlin. Select any project to visualize its architecture and dive into the codebase using Codyn's AI engine.
#1justjavac/free-programming-books-zh_CN
:books: 免费的计算机编程类中文书籍，欢迎投稿
#2JetBrains/kotlin
The Kotlin Programming Language.
#3square/okhttp
Square’s meticulous HTTP client for the JVM, Android, and GraalVM.
#4gkd-kit/gkd
基于无障碍，高级选择器，订阅规则的自定义屏幕点击安卓应用 | An Android APP with custom screen tapping based on Accessibility, Advanced Selectors, and Subscription Rules
#5square/leakcanary
A memory leak detection library for Android.
#6yuliskov/SmartTube
Browse media content with your own rules on Android TV
#7NativeScript/NativeScript
⚡ Write Native with TypeScript ✨ Best of all worlds (TypeScript, Swift, Objective C, Kotlin, Java, Dart). Use what you love ❤️ Angular, React, Solid, Svelte, Vue with: iOS (UIKit, SwiftUI), Android (View, Jetpack Compose), Flutter and you name it compatible.
#8JunkFood02/Seal
🦭 Video/Audio Downloader for Android, based on yt-dlp
#9tipsy/profile-summary-for-github
Tool for visualizing GitHub profiles
#10mihonapp/mihon
Free and open source manga reader for Android
#11JetBrains/compose-multiplatform
Compose Multiplatform, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable.
#12Tencent/MMKV
An efficient, small mobile key-value storage framework developed by WeChat. Works on Android, iOS, macOS, Windows, POSIX, and OHOS.
#13gradle/gradle
Adaptable, fast automation for all
#14sqlc-dev/sqlc
Generate type-safe code from SQL
#15open-ani/animeko
集找番、追番、看番的一站式弹幕追番平台，云收藏同步 (Bangumi)，离线缓存，BitTorrent，弹幕云过滤。100% Kotlin/Compose Multiplatform
#16mamoe/mirai
高效率 QQ 机器人支持库
#17ankidroid/Anki-Android
AnkiDroid: Anki flashcards on Android. Your secret trick to achieve superhuman information retention.
#18wasabeef/glide-transformations
An Android transformation library providing a variety of image transformations for Glide.
#19InsertKoinIO/koin
Koin - a pragmatic lightweight dependency injection framework for Kotlin & Kotlin Multiplatform
#20iSoron/uhabits
Loop Habit Tracker, a mobile app for creating and maintaining long-term positive habits
#21JetBrains/Exposed
Kotlin SQL Framework
#22square/okio
A modern I/O library for Android, Java, and Kotlin Multiplatform.
#23bitwarden/android
Bitwarden mobile apps (Password Manager and Authenticator) for Android.
#24orhanobut/dialogplus
Advanced dialog solution for android
#25WooVictory/Ready-For-Tech-Interview
💻 신입 개발자로서 지식을 쌓기 위해 공부하는 공간 👨💻
#26android10/Android-CleanArchitecture-Kotlin
This is a movies sample app in Kotlin, which is part of a serie of blog posts I have written about architecting android application using different approaches.
#27AlmasB/FXGL
Java / JavaFX / Kotlin Game Library (Engine)
#28slackhq/circuit
⚡️ A Compose-driven architecture for Kotlin and Android applications.
#29TimefoldAI/timefold-solver
The open source Solver AI for Java and Kotlin to optimize scheduling and routing. Solve the vehicle routing problem, employee rostering, task assignment, maintenance scheduling and other planning problems.
#30miaowmiaow/fragmject
fragmject is a learning project prepared for Kotlin and Jetpack Compose. | fragmject 是一个为初学者准备的上手项目。 通过对 Kotlin 和 Compose 的系统运用，实现的一个功能完备符合主流市场标准 App。 fragmject 没有复杂的业务和多余的封装， 完全依照 Android Developer 官方的写法。 代码简单，内容全面，快速上手，对理解其他项目设计思想和封装技巧也很有帮助。
#31measure-sh/measure
Measure helps mobile teams monitor and fix crashes, ANRs, bugs, and performance issues. The open source alternative to Firebase Crashlytics.
#32py2many/py2many
Transpiler of Python to many other languages
#33Pangu-Immortal/MagicWX
Android 17 local LLM prototype with Jetpack Compose and ONNX Runtime for offline AI inference experiments.
#34alashow/datmusic-android
Music search, downloader & player app using Jetpack Compose
#35Darkrock-Studios/hammer-editor
A simple tool for building stories.
#36cortinico/kotlin-gradle-plugin-template
🐘 A template to let you started with custom Gradle Plugins + Kotlin in a few seconds
#37appwrite/sdk-generator
Generating SDKs for multiple programming languages and platforms ⚙️
#38avaje/avaje-inject
Dependency injection via source code generation
#39REBEL-ROOT/omni-browser
Omni Browser is a secure, open-source Android browser by RebelRoot. Built on Mozilla GeckoView, it features native WebExtension support, aggressive media stream interception, a private encrypted locker, and on-device machine learning tools.
#40khaledmahmud5286-cmd/manga-zen-reader
Best Koma Manga Reader Alternatives 2026: Open Source Android Apps
#41arcships/aimux
Unified LLM access layer in Rust — one API for 325 AI providers. 统一 LLM 服务接入层：一套 API 接入 325 家 AI 服务商。
#42AndyShaman/BYDMate
Android app for BYD DiLink 5.0: real consumption from BMS, GPS trips, charges journal, automation rules, floating widget, AI insights. Bilingual RU/EN. Tested on Leopard 3 / Fangchengbao Bao 3.