kotlin

Know about real-time state of a Android app Permissions with Kotlin Flow APIs.

A Powerful AlphabetIndex FastScroller Library for Android's RecyclerView!

🎶 Song.link client to open songs from different platforms to your favourite one

A library to make Xposed modules development easily.

Slack Developer Kit (including Bolt for Java) for any JVM language

High-performance Windows file search + duplicate finder using NTFS USN/MFT, with Android LAN sync. Built with Tauri, Rust, C++, and Kotlin.

Recipe App in Compose Multiplatform (KMP) targeting Android, iOS, Web and Desktop.

Fantasy Premier League Kotlin/Compose Multiplatform sample

Offline semantic Text-to-Image and Image-to-Image search on Android powered by quantized state-of-the-art vision-language pretrained CLIP model and ONNX Runtime inference engine

The Android FHIR SDK is a set of Kotlin libraries for building offline-capable, mobile-first healthcare applications using the HL7® FHIR® standard on Android.

Multi-OS Engine: Create iOS Apps in Java (or Kotlin ... etc.)

♻️ Example projects illustrating Code Smells in order to apply Refactoring techniques

A calculator for quick simple calculations with a nice user interface and no ads

Lock and wipe on emergency

BLESSED, a Bluetooth Low Energy (BLE) library for Android

Converter of <any kind of declarations> to Kotlin external declarations

Probably the best Kotlin utils library for Android. (可能是最好用的 Kotlin 工具库)

Galway Bus Kotlin Multiplatform project using Jetpack Compose and SwiftUI

:book:StickyTimeLine is timeline view for android.

Starter RESTful service with websocket notifications using Kotlin, Ktor and Exposed with H2, HikariCP and FlyWay

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

Examples with Kotlin/Wasm

A Vulkan / WebGPU / OpenGL engine for Desktop JVM, Android and Javascript written in Kotlin

The most essential libraries for Kotlin Multiplatform development

5 Day Forecast app that works on Android and uses latest tools (Kotlin, Navigation, Room, LiveData, Databinding, Dagger 2)

🗺 The Kotlin Multiplatform Developer Roadmap offers comprehensive learning paths to help you understand KMP ecosystems.

🔐 An SSL library for configuring http client or server. Rich with features such as hot reloading ssl and trusting additional certificates during runtime, combining multiple keystores, loading pem files and os/jdk certificates, logging certificate information during ssl handshake, bypassing ssl configuration from other libraries and more

An Android File downloader library based on WorkManager with pause and resume support.

Jetpack Compose Agent Skill — AI-powered coding guidance with actual androidx/androidx source code receipts. Works with Claude Code, Codex CLI, Gemini CLI, Cursor, Copilot, Windsurf, and more.

Get started with Timefold quickstarts here. Optimize the vehicle routing problem, employee rostering, task assignment, maintenance scheduling and other planning problems.