Source code for Unturned, a free open-world zombie survival sandbox game.

High-performance, zero-copy JSON and Proto JSON serializer for Kotlin Multiplatform (KMP) and Ktor, powered by KSP2

A block-based rich text editor for Compose Multiplatform - the Notion/Craft editing model, natively in Kotlin

MCP server for Wanderlog — build and edit trip itineraries through conversation

Realtime Voice AI Toys with 100+ Models on Arduino ESP32 with Secure Websockets and Edge Functions for AI Companions, and Devices

Code for MIRA: Multiplayer Interactive World Models with Representation Autoencoders

The diary of Tom Riddle for the reMarkable Paper Pro — write with your pen, the page drinks your ink and answers in a flowing hand

CoKit is a Kotlin client library for Codex App Server.

A Kotlin Multiplatform library for observing network connectivity on Android and iOS

PlayStation 4 emulator for Windows, Linux, macOS and FreeBSD written in C++

Draw custom images on your Revolut card using your phone's drawing screen. RevoDraw automatically detects the drawing boundaries and lets you upload, edit, and draw images via ADB.

A Kotlin DSL for declarative keyboard hotkey handling in Compose Multiplatform.

An open-source, code-first Java toolkit for building, evaluating, and deploying sophisticated AI agents with flexibility and control.

Race your friends using public transport on a map

Communicate Freely

The cryptography-based networking stack for building unstoppable networks with LoRa, Packet Radio, WiFi and everything in between.

LXMF client for Android, Linux and macOS allowing you to communicate with people or LXMF-compatible systems over Reticulum networks using LoRa, Packet Radio, WiFi, I2P, or anything else Reticulum s…

HTTP client generator / KSP plugin for Kotlin Multiplatform (Android, iOS, Js, Jvm, Native, WasmJs)) using KSP and Ktor clients inspired by Retrofit https://foso.github.io/Ktorfit

The official Kotlin SDK for Model Context Protocol servers and clients. Maintained in collaboration with JetBrains

Kotlin multiplatform Audio System Library

Open-Source Frontier Voice AI

A self-hosted travel/trip planner with real-time collaboration, interactive maps, PWA support, SSO, budgets, packing lists, and more.

Koin - a pragmatic lightweight dependency injection framework for Kotlin & Kotlin Multiplatform

Kotlin Multiplatform statistics library: distributions, hypothesis tests, correlation, descriptive stats, and sampling

Open-source repository of Orbiter Space Flight Simulator

A self-hosted, community-driven server (BYOS) with Recipe support in PHP's Laravel framework