SubServers Creator is a new way to create SubServers. Using the in-game GUI you can create new Subservers! Just click the "Create..." option in the Bottom right corner and setup the server as instructed.
Keep in mind that SubServers still does not Include Minecraft Server Jarfiles, but it builds/downloads them. Tested Working on Windows & Mac OS. (Don't have linux, but it should work as it uses bash)
Requirements to build a SubServer are the same...