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Top 23 Kotlin Open-Source Projects
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Project mention: Modern concurrency approaches on the JVM: Coroutines and Loom | dev.to | 2026-06-02
A coroutine is a lightweight thread that is managed by the Kotlin runtime. Coroutines were initially proposed in Kotlin version 1.1 M01, released in 2017. The first stable version was released with Kotlin 1.3 one year later.
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Just to throw one on the pile https://github.com/yuliskov/smarttube for android based TV media box is great.
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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.
NativeScript is a hybrid mobile app framework that allows developers to build truly native iOS and Android apps using JavaScript, TypeScript, or Angular. Unlike frameworks that rely on WebViews, NativeScript provides direct access to native APIs, ensuring apps perform like native applications. It is ideal for developers who want the convenience of JavaScript while leveraging full native functionality.
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Project mention: Modularizing Your Android Build with Convention Plugins and Version Catalogs: The Gradle Architecture That Cuts CI Time in Half | dev.to | 2026-04-16
## Gotchas - **Modularization is a graph problem, not a counting problem.** 40 modules in a linear chain are worse than 10 modules in a flat graph. Run `./gradlew :app:dependencies` and break feature-to-feature edges. - **Use `api` vs `implementation` strictly.** Feature modules should never expose transitive dependencies to other feature modules — because they should never depend on each other. - **Configuration cache requires dropping buildSrc.** You cannot get meaningful cache hit rates while `buildSrc` is in play. This is the single highest-ROI change you can make. - **Clean build times improve less dramatically than incremental ones.** Expect clean builds to go from 8m 12s to around 5m 48s. The real payoff is in the incremental cycle you hit hundreds of times per day. ## Wrapping Up Start with the `build-logic` migration — it typically takes a day and unlocks configuration caching immediately. Then flatten your dependency graph so feature modules only reach down to `:core-*` modules. Finally, move version catalog bundle references into your convention plugins. I've watched teams accept 20-minute CI runs for months because "that's just how Gradle is." It isn't. A day of restructuring paid back within a week on our team. For further reading, check the [Gradle composite builds docs](https://docs.gradle.org/current/userguide/composite_builds.html) and the [Now in Android](https://github.com/android/nowinandroid) project, which implements this exact pattern at scale.
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compose-multiplatform
Compose Multiplatform, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable.
Project mention: The Future of KMP: Upgrading to Kotlin 2.3.20 and Compose 1.10.3 | dev.to | 2026-06-27[1]: ImagePickerKMP Documentation [2]: ImagePickerKMP GitHub Repository [3]: Kotlin 2.3.20 Release Notes [4]: Compose Multiplatform Releases
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Gradle is a modern build system and dependency manager used in Java, Kotlin and Android development. It uses a task-based approach and supports incremental builds and caching for speed.
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MMKV
An efficient, small mobile key-value storage framework developed by WeChat. Works on Android, iOS, macOS, Windows, POSIX, and OHOS.
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Project mention: Show HN: Bun-sqlgen – Type-safe raw SQL for Bun, no ORM | news.ycombinator.com | 2026-06-23
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komi-store
🩵 A free, open-source app store for developers' releases on GitHub, Codeberg & Forgejo — browse, discover, and install apps with one click. Formerly GitHub Store.
Project mention: I built GitHub Store to 12,500 stars in 6 months – I started at 16 | news.ycombinator.com | 2026-05-08 -
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Project mention: RCS is a "standard" in name only – $15k bounty trying to break Google's lock-in | news.ycombinator.com | 2026-04-07
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Project mention: Modern concurrency approaches on the JVM: Coroutines and Loom | dev.to | 2026-06-02
A coroutine is a lightweight thread that is managed by the Kotlin runtime. Coroutines were initially proposed in Kotlin version 1.1 M01, released in 2017. The first stable version was released with Kotlin 1.3 one year later.
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ImageToolbox
🖼️ 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 wide range of image processing options
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android-interview-questions
Your Cheat Sheet For Android Interview - Android Interview Questions and Answers
Outcome School Android Program
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Project mention: NewPipe: YouTube client without vertical videos and algorithmic feed | news.ycombinator.com | 2026-02-14
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recyclerview-animators
An Android Animation library which easily add itemanimator to RecyclerView items.
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Project mention: Pkl from Apple: configuration as code language with rich validation and tooling | news.ycombinator.com | 2026-05-31
NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Kotlin discussion
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A Privacy-First Analytics API: One Facade, A Provider SPI, And A Consent Gate
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Funding Open Source Without The Bait And Switch: Analytics, Native Maps, TV And More
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A new Android malware from Google
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jul 2026
Index
What are some of the best open-source Kotlin projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | kotlin | 53,100 |
| 2 | OkHttp | 46,993 |
| 3 | SmartTube | 30,884 |
| 4 | leakcanary | 29,935 |
| 5 | Seal | 27,375 |
| 6 | NativeScript | 25,550 |
| 7 | mihon | 21,933 |
| 8 | nowinandroid | 21,472 |
| 9 | compose-multiplatform | 19,191 |
| 10 | Gradle | 18,726 |
| 11 | MMKV | 18,652 |
| 12 | sqlc | 17,973 |
| 13 | komi-store | 16,318 |
| 14 | ktor | 14,454 |
| 15 | GmsCore | 13,791 |
| 16 | kotlinx.coroutines | 13,790 |
| 17 | quicktype | 13,779 |
| 18 | ImageToolbox | 13,696 |
| 19 | android-interview-questions | 12,348 |
| 20 | LibreTube | 12,231 |
| 21 | Coil | 11,843 |
| 22 | recyclerview-animators | 11,540 |
| 23 | pkl | 11,456 |
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