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MongoDB Atlas runs apps anywhere
Deploy in 115+ regions with the modern database for every enterprise.
MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
Arianne is an engine to develop multiplayer online games like Stendhal
...The engine Marauroa provides a simple way of creating games on a portable and robust server architecture. Marauroa manages the client server communication and provides an object orientated view of the world for game developers. It handles database access in a transparent way to store player accounts, character progress and the state of the world
Pygrid is an open-source and cross-platform pygame/python 2D engine.
Pygrid is an open-source cross-platform pygame/python engine for the development of 2D top-view and platform games. It follows the "grid-fixed" principle, in which every game-object has a fixed size based on a grid (What allows perfect object interaction, such as "collision" and "movement").
Habanero3d is a object-oriented 3d game engine written in C++, OpenGL, and GLSL with set of additional tools (written in number of languages), to make developers' life easier.
Habanero3d is targeted for indie games, and is in development.
Zen Worlds is an object oriented C++ virtual worlds / MMO game engine framework. This project includes Zen Engine game engine client, Zen Enterprise, an Enterprise Service Bus, and a C++ Application Server, and Zen Studio, a game development IDE.