Open source. Open possibilities.

LoveBrain is an open-source Android floating-window dating assistant. Long-press a message to generate reply suggestions in four styles. It uses a local knowledge base and long-term relationship memory to understand you better over time, with zero telemetry and no backend.

Kotlin SDK for TelemetryDeck, a privacy-conscious analytics service. Send signals, track sessions, monitor user retention and acquisition from Android apps with minimal setup.

A modern Android task management app built with Jetpack Compose and Room Database, featuring task CRUD operations, due dates, prioritization, multiple task lists, and Material 3 UI design.

Komi Store is a free, open-source cross-platform app store that indexes releases published on GitHub, Codeberg and Forgejo, letting users browse, discover and install open-source software with one click.

Gradle is a scalable build automation tool supporting Java, Kotlin, Scala, Android, Groovy, C++ and Swift, with IDE and CI integration plus extensive documentation and community resources.

2024 Programming Challenges Roadmap: step-by-step exercises, solutions, videos, and rankings. Use any language and contribute your solutions.

A Kotlin library that bridges JetBrains Koog with Spring AI and LangChain4j, providing LLM client adapters and a fluent AI Agent Builder for constructing complex agent behaviors.

SmartTube is a free, open-source media client for Android TVs and TV boxes. It features SponsorBlock integration, 8K/60fps playback, HDR support, and does not require Google Services.

Okio is a modern I/O library for Android, Java, and Kotlin Multiplatform that complements java.io and java.nio to simplify data access, storage, and processing. Originally part of OkHttp, it is well-exercised and production-ready.

Zales is a personal VPN client for Android with a minimalist interface. It supports VLESS and Outline keys, automatically selects methods to bypass blockages, and restores connection when traffic is frozen. Keys are stored in hardware storage, and telemetry is absent.

AuraMusic is a cross-platform YouTube Music client for Android and desktops, featuring Nothing OS themes, Automix DJ transitions, Android Auto lyrics, and AI diagnostics.

sqlc generates type-safe code from SQL queries, supporting multiple languages via plugins. It compiles SQL to idiomatic code, reducing boilerplate and errors.

YTDLnis is a free, open-source Android audio/video downloader built on yt-dlp, supporting 1000+ websites, playlists, scheduling, custom commands, cookies, subtitle/metadata embedding, SponsorBlock removal, and plugin-based runtime management.

Simple Multi Apps - Kotlin is an open-source Android application featuring a modular collection of tools including a stopwatch, games, PDF reader, and video player.

Exposed is a lightweight Kotlin SQL framework and ORM providing a typesafe DSL and DAO API for relational database access, supporting JDBC and R2DBC drivers across multiple database engines.

A highly customizable calendar library for Android and Compose Multiplatform, providing the logic for date displays while allowing developers to define the UI.

A web tool that visualizes a GitHub user's profile and activity as charts and statistics, with a hosted demo and self-hosting instructions.

Gatling is an open‑source load‑testing platform that lets you write performance tests as code in Java, JavaScript/TypeScript, Kotlin or Scala. It uses a non‑blocking, asynchronous engine for high scalability, supports HTTP, WebSocket, SSE, JMS, gRPC and MQTT, and integrates with CI/CD pipelines, APM tools and observability platforms.

Antares is an open-source digital circuit learning platform written in Kotlin. It provides tools to design and simulate digital circuits with embedded explanations, featuring a Swing-based desktop application.

An AI-first engineering toolkit that provides specialized knowledge, workflows, and standards to turn AI coding agents into senior mobile engineers.