An introduction from minetest website: " Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner, Minecraft, and the like. Minetest is available natively for Windows, OS X, GNU/Linux, Android, and FreeBSD. It is Free/Libre and Open Source Software, released under the LGPL 2.1 or later. "
In short, MineTest is a Free and Open Source re-implementation of MineCraft, but it provide many flexible features compare MineCraft. It's not only a game but also a framework for developers to extend so to make their own worlds.
Salt – The most intelligent, powerful and flexible open source software for remote execution, configuration automation, cloud control and event-driven orchestration
The goal of the project is to bring its power into QAM, improving efficacy of work and possibly replacing other tools, where Salt could perform the task more naturally.