LawinServerV1 is a local, single-user Fortnite backend (server emulator) which supports both Battle Royale and Save the World.
LawinServerV2 is a Fortnite backend (server emulator) designed to handle many users. It features a proper account system and XMPP support.
This program is an NFS World backend (server emulator) written in Node.js which allows you to play the game locally.