57 open source projects written in Kotlin
Every Kotlin project in the registry, ranked by GitHub stars — license and last push on every entry, data pulled live from the GitHub API every night.
Signal ★ 30K Private messaging with end-to-end encryption
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
MaterialFiles ★ 9.4K Material Design file manager for Android
rikkahub ★ 8.6K RikkaHub is an Android APP that supports for multiple LLM providers.
xdm ★ 8.3K Fast file and video downloader with HLS, DASH and batch download support
jev-chat-jarvis ★ 8.2K 装在手机上的对话副驾：在 QQ / X / 飞书里读懂对方、给出候选回复、一键填入输入框，发不发由你。非侵入，只读屏幕，不 hook 不改包。
KeePassDX ★ 7.6K Lightweight vault and password manager for Android, KeePassDX allows editing encrypted data in a single file in KeePass format and fill in the forms in a secure
FXGL ★ 4.9K Java / JavaFX / Kotlin Game Library (Engine)
auto-dev ★ 4.6K 🧙AutoDev: the Multi-Agent coding development platform built on Kotlin Multiplatform.
PhotoEditor ★ 4.5K A Photo Editor library with simple, easy support for image editing using paints,text,filters,emoji and Sticker like stories.
gradle-play-publisher ★ 4.3K GPP is Android's unofficial release automation Gradle Plugin. It can do anything from building, uploading, and then promoting your App Bundle or APK to publishi
Balloon ★ 4.0K :balloon: Modernized and sophisticated tooltips, fully customizable with an arrow and animations for Compose and Kotlin Multiplatform.
android ★ 4.0K Home Assistant Companion for Android
chatgpt-android ★ 3.9K 📲 ChatGPT Android demonstrates a Chatbot application using OpenAI's chat API on Android with Stream Chat SDK for Compose.
dokka ★ 3.8K API documentation engine for Kotlin
kotlin-logging ★ 3.1K Lightweight Multiplatform logging framework for Kotlin. A convenient and performant logging facade.
apps-android-wikipedia ★ 3.1K 📱The official Wikipedia app for Android!
Lightning-Browser ★ 2.5K A lightweight Android browser with modern navigation
Xed-Editor ★ 2.4K Advanced Text Editor for Android
SeriesGuide ★ 2.2K Track your TV shows and movies on Android
ort ★ 2.1K A suite of tools to automate software compliance checks.
CatchUp ★ 2.1K An app for catching up on things.
FancyShowCaseView ★ 2.0K An easy-to-use customisable show case view with circular reveal animation.
Squircle-CE ★ 1.9K 👨💻 Squircle CE is a fast and free multi-language code editor for Android
intellij-elixir ★ 1.9K Elixir plugin for JetBrain's IntelliJ Platform (including Rubymine)
HTTP-Shortcuts ★ 1.9K Android app to create home screen shortcuts that trigger arbitrary HTTP requests and more
File-Manager ★ 1.8K Easy app for managing your files without ads, respecting your privacy & security
ZenConverter ★ 1.8K Local Android file converter built with Kotlin and Jetpack Compose. Convert files on device, with no ads, accounts, or upload-based fallback.
inql ★ 1.8K InQL is a robust, open-source Burp Suite extension for advanced GraphQL testing, offering intuitive vulnerability detection, customizable scans, and seamless Bu
lets-plot ★ 1.8K Multiplatform plotting library based on the Grammar of Graphics
appshark ★ 1.8K Appshark is a static taint analysis platform to scan vulnerabilities in an Android app.
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.
amethyst ★ 1.6K Nostr client for Android
2FAS ★ 1.6K Local-first 2FA authenticator and password manager
curbox-android ★ 1.5K Free Open Source App & Website Blocker
Showly ★ 1.5K Track TV shows and movies, synced with Trakt.tv
Kai ★ 1.3K OpenClaw alternative in your pocket
MoeMemosAndroid ★ 1.2K An app to help you capture thoughts and ideas
Monica ★ 1.2K Monica Pass，Password Management, 2FA Generator
IdeaMemo ★ 1.2K A Beautiful Memo App written with Jetpack Compose. 开源Android闪念笔记App。
FairScan ★ 1.0K An Android app to scan your documents — simple and respectful
disky ★ 970 An android filesystem analyzer that can show you the usage of your storage!
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
PixImagePicker ★ 871 Pix is a Whatsapp image picker replica. with this, you can integrate an image picker just like WhatsApp.
android-pass ★ 815 Android code for the Proton Pass application
hammer-editor ★ 809 A simple tool for building stories.
doodle ★ 802 A pure Kotlin UI framework for the Web and Desktop.
NotallyX ★ 788 Minimalistic Android note taking App | Notally, but eXtended.
KeyPass ★ 787 KeyPass: Open Source Project & An Offline Password Manager. Store, manage, and take control securely.
CoolMallKotlin ★ 747 Full‑Featured Android Compose App Framework • Kotlin, MVVM, Navigation, Networking, Storage & Modular Architecture for Real‑World Projects
Visual-Code-Space ★ 693 A Modern Code Editor for Android
Pdf_Tools ★ 683 Privacy-first, offline PDF editor for Android. Merge, split, compress, convert and annotate PDFs — 100% on-device, no internet required.
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
vmodal_sdk_android ★ 562 Video Search SDK for Android Kotlin. Integrate in any video app
askimo ★ 541 AI desktop app for chat, RAG, Skills, MCP tools, and agents. Support multiple LLMs (Anthropic, OpenAI, VertexAI, vLLM, Nvidia NIM, Gemini, OpenRouter)
yona ★ 501 Project Hosting SW
paralino ★ 78 ← all stacks · or see best-of lists
Frequently asked questions
How many open source projects are written in Kotlin?
This registry tracks 57 Kotlin projects, with 180,029 GitHub stars between them and a median of 1,814 stars. The most-adopted is Signal at 29,569 stars.
Which Kotlin projects are most actively maintained?
51 of the 57 projects were pushed in the last 90 days. Each entry above shows its exact last-push date, so you can filter out dormant projects before committing to one.
What licence are Kotlin projects usually under?
56 of the 57 carry an explicit open-source licence across 5 distinct licences, and the licence is shown on every card. Permissive licences (MIT, Apache-2.0) are the safest default for commercial use; check the copyleft ones individually.
Should I use Kotlin or Java for my project?
Both are viable. Kotlin is the better default if your team already knows it or the libraries you need are written in it; Java may suit you better if you need the ecosystem, tooling or performance profile it is known for. The registry lists 57 Kotlin projects to work from.