JoinLobby is a plugin developed to control and manage players' spawns points when they join the server. Actually, JoinLobby is available only for servers.
With JoinLobby you can create several spawns for all ranks and user groups on your server, and players will appear randomly depending wich group is or what ranks it has. Also, if you want, the player will respawn in the previously set spawns, with the same dynamic that governs the plugin (randomness).