OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

a fast, scalable, multi-language and extensible build system

Desktop/Android/HTML5/iOS Java game development framework

This is a sample app that is part of a series of blog posts I have written about how to architect an android application using Uncle Bob's clean architecture approach.

Asynchronous socket, http(s) (client+server) and websocket library for android. Based on nio, not threads.

High-quality WebSocket client implementation in Java.

Google Play game services - Android samples