Getaround - Instantly rent cars near you. Rent nearby cars, trucks, and vans, by the hour or day.
Minetest - Minetest is a near-infinite-world block sandbox game and a game engine, inspired by InfiniMiner...
Turo - Turo is a peer-to-peer (P2P) car sharing marketplace where you can easily book any car you want, wherever you want it.
Minecraft - A block-building game that allows you to create and explore entire worlds from scratch.
ZipCar - ZipCar is a free mobile app that connects you with rental vehicles just about anywhere in the world. You can instantly reserve a vehicle, and even unlock it directly from the app.
Terasology - Terasology (started under the name Blockmania) is an open source project started by Benjamin...