HorseHelper is a very lightweight plugin which fixes issues present in the current version of Minecraft for horses and adds very specific things which many Equestrian Servers rely on.
Fixes horses disappearing when players log out while riding them
Stops players who don't have the permission node horsehelper.killhorses from killing horses
Will notify you if a new version of the plugin is available (disable with updatecheck:false; in the horsehelper_config file)
More coming soon, request features in the comments