AutoKick is a plugin that allows you to effectively shut down your server to all users except OPs and those with "autokick.nokick" permission. If you have to bring your server down for any reason (e.g. editing the map or testing plugins), you can enable AutoKick and it will kick the players you want. It blocks the kicked users from logging back into the server but allows everyone else to join and leave freely

ForumAcc allows you to force any users that sign up to your forums to activate their account from your Minecraft server. Perfect for stopping spam!

Every server has amazing buildings but to a new user it may not be easy for them to see the best of the best. With TourGuide you can set points of interest for your users to view, as well as descriptions that will be shown to the user. Why not show them around yourself? Become the Guide for a Tour.