Browse Kotlin Multiplatform libraries

Open, lightweight event-based protocol standardizing agent-to-user application interactions, with transport-agnostic middleware, streaming real-time chat, bi-directional state sync, generative UI, structured messages, and tool integrations.

Fast, lightweight inference framework for energy-efficient on-device AI: numerical computation graph API, OpenAI-compatible inference engine, INT8 optimizations and model/tooling for compact, low-power deployments.

Framework for testing concurrent algorithms on the JVM. Enables declarative test specification, automatically generates random scenarios, and verifies correctness properties using stress-testing or model checking.

Multi-platform game engine focuses on OpenGL/WebGPU, offering diverse demos (physics, UI, shaders, PBR, etc.), basic compute shader support, a shader language DSL, and an ongoing graphical scene editor.

Type-safe automatic differentiation framework enabling users to express differentiable programs with higher-dimensional data structures and operators. Ensures compile-time algebraic validity, reducing runtime errors and supporting advanced features like shape-safe tensor operations, symbolic derivatives, and property-based testing for numerical gradient checking.

2D game development framework inspired by libGDX and KorGE, offering flexibility and idiomatic features. Supports desktop, web, and Android platforms, with a planned iOS release.

Composable web framework enabling modern web application development with declarative UI components, state management, server-side rendering, and support for WebAssembly and JavaScript targets.

AI-powered mobile testing framework enables authoring and executing tests using natural language, supports on-device execution, offers custom agent tools, and provides detailed reporting with Maestro integration.

Test-only toolkit turning UI recomposition behavior into assertions: tag composables, assert per-instance recomposition counts, get one-line test setup plus rich diagnostics and causality analysis.

Powerful type-safe frontend framework delivers reactive state management, component-based architecture, and comprehensive styling for building elegant, responsive applications with declarative syntax and enhanced UI capabilities.

Simplifies dependency injection with compile-time validation and faster compilation by generating code for dependency resolution. Features include constructor-based injection, singleton management, and module scoping without runtime file generation.

Modular, lightweight framework for apps, APIs, CLIs and jobs; offers infrastructure abstractions, provider integrations (AWS, Twilio, SendGrid, Slack), CLI generators and sensible defaults.

AOP framework enabling method replacement at compile-time through custom hooks. Offers runtime support, original method invocation, and inlining for reduced dependency issues. Supports specific platforms.

Framework enables 3D visualization for scientific applications, focusing on particle physics experiments. Features include event display, scene graph, and support for external system integration.

All-purpose command-line test framework for evaluating and certifying static analyzers, compilers, and other code-related tools. Enables automated test detection, comparison of expected vs. actual warnings, and supports multiple plugins for diverse testing scenarios.

Cross-platform UI framework inspired by Solid.js, leveraging native view components for fine-grained reactivity, smaller binary sizes, semantic theming, and seamless web integration with URL-based navigation.

Multiplatform drawing library offers a canvas and chart rendering framework for diverse environments. Explore documentation and APIs for detailed usage.

UI framework combining MVI, MVVM, and SAM principles. Simplifies business logic encapsulation, supports various programming styles, ensures predictability, and offers composability for complex applications.

Framework for developing 2D board games, featuring examples like MauMau, Sudoku, and Tetris. Offers comprehensive guides, playground for experimentation, and supports various development environments.

Lightweight UI framework for building scalable, fully multiplatform applications. Achieves modularity through independent components called black-boxes, promoting code reusability, lifecycle awareness, and declarative navigation.

Coroutine-driven modern router enabling suspendable cross-module navigation with compile-time annotation scanning, automatic route/service aggregation, type-safe parameter passing, lifecycle-bound ViewModels, service discovery, and advanced transitions.

Offers a user-friendly API for interacting with various AI models, including OpenAI, featuring chat, embedding, image processing, and planned audio transcription and speech capabilities.

Framework assists in building research platforms for distributed data collection. Features include defining, deploying, and monitoring studies, modularity, and extensibility. Supports data collection from multiple devices.

Extensible, plugin-based debugging platform with runtime-loadable modules, DSL configuration, simultaneous session support, and type-safe serialized communication for customizable debugging workflows.

Lightweight framework for building decentralized social and messaging services, implementing the Milky protocol with networking primitives, serialization, extensible modules, and comprehensive documentation and community support.

Drastically speeds server development with high-level abstractions for databases, cache, email, SMS, and file storage; typed HTTP/WebSocket endpoints, auth flows, auto-generated docs and SDKs, Terraform output.

Lightweight, expressive MVI architecture with minimal boilerplate, delivering unidirectional state management using flows, pure reducers, intents, effects, and modular integrations for UI, DI, use cases, dispatchers.

Implements a lightweight ASPIC+-like framework for structured argumentation, offering a Prolog interpreter with GUI and library integration via Gradle, Maven, and NPM.

Specifies best practices and architectural patterns for software development. Offers multiplatform artifacts for seamless integration across various environments, with detailed migration guidance from previous versions.

DSL wrapper simplifies creating and managing presentations using Reveal JS. Enables running, bundling, rendering to PDF, and initializing new presentations from templates with ease.