This plugin is called dragon travel. This plugin lets players summon dragons and ride them to places, but not controll them like boats, or like if the player was moving. It lets admins place destinations for dragons, for example: an admin could make a destination for players to read rules, so ppl do /dt travel rules, etc. It also allows players to go to a sepcific place by having its coordinates. This server should have this plugin because, if someone posts a vid of the server, people will be like: WOW! You can ride dragons in that server! I want to join! And this server would be much more popular and cool for the players of the server. Hope you consider this mod!
~emp
http://dev.bukkit.org/server-mods/dragontravel/
~emp
http://dev.bukkit.org/server-mods/dragontravel/