Open source kotlin projects
Every project in the registry tagged kotlin, ranked by real GitHub adoption.
Adaptable, fast automation for all
🖼️ 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
Material Design file manager for Android
:balloon: Modernized and sophisticated tooltips, fully customizable with an arrow and animations for Compose and Kotlin Multiplatform.
Home Assistant Companion for Android
📲 ChatGPT Android demonstrates a Chatbot application using OpenAI's chat API on Android with Stream Chat SDK for Compose.
The Pants Build System
API documentation engine for Kotlin
Library for OpenAPI 3 with spring-boot
Lightweight Multiplatform logging framework for Kotlin. A convenient and performant logging facade.
📱The official Wikipedia app for Android!
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
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
A lightweight Android browser with modern navigation
Track your TV shows and movies on Android
An app for catching up on things.
An easy-to-use customisable show case view with circular reveal animation.
👨💻 Squircle CE is a fast and free multi-language code editor for Android
Easy app for managing your files without ads, respecting your privacy & security
Multiplatform plotting library based on the Grammar of Graphics
A Gradle plugin that publishes your Android and Kotlin libraries, including sources and javadoc, to Maven Central or any other Nexus instance.
Nostr client for Android
Monica Pass，Password Management, 2FA Generator
A Beautiful Memo App written with Jetpack Compose. 开源Android闪念笔记App。
A Kotlin-based testing/scraping/parsing library providing the ability to analyze and extract data from HTML (server & client-side rendered). It places particula
Pix is a Whatsapp image picker replica. with this, you can integrate an image picker just like WhatsApp.
A simple tool for building stories.
A live media player app（电视直播软件）
A pure Kotlin UI framework for the Web and Desktop.
KeyPass: Open Source Project & An Offline Password Manager. Store, manage, and take control securely.
Full‑Featured Android Compose App Framework • Kotlin, MVVM, Navigation, Networking, Storage & Modular Architecture for Real‑World Projects
A Modern Code Editor for Android
Privacy-first, offline PDF editor for Android. Merge, split, compress, convert and annotate PDFs — 100% on-device, no internet required.
Kuvasz (pronounce as [ˈkuvɒs]) is an open-source uptime and SSL monitoring service, with multiple notification channels, status pages, IAC support via YAML, Pro
Dual-control Android management for Windows — ADB Mode (scrcpy GUI mirroring & control) and App Mode (calls, media, notifications, Audio Cast).
Connect APIs, databases, and streams without glue code
Related tags
Frequently asked questions
How many open source kotlin projects are there?
This registry tracks 36 projects tagged kotlin, with 107,634 GitHub stars between them. The most-adopted is gradle at 18,913 stars.
Are these kotlin projects free to use?
Yes — 34 of the 36 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?
30 of the 36 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.